In this task, you are given a conversation between a flight agent and the customer. You are given 4 options and you need to select the goal of the conversation. It is provided as part of customer's context, which has to be one of the following: `book`: Make a new reservation, `cancel`: Cancel an existing reservation, `no_flight`: No flight found for the customer's preference, `no_reservation`: No reservation / No change / No cancellation was made in the conversation, mostly enquiring details

Q: customer: Hi, I am John Phillips. 
 agent: Hello, how can I aid you today? 
 customer: I would like to visit at Washington for enjoying holidays, can you help me to book a flight ticket from LGA to IAD? 
 agent: Sure, we are glad to help you. Can you please share me your travelling dates? 
 customer: I am travelling from July 10 to July 12. 
 agent: Do you prefer any stopover in between journey? 
 customer: Yes, I need a stopover in between my journey. 
 agent: Do you prefer to travel in economy class or business class? 
 customer: I prefer economy class. 
 agent: Is there any airline preferences for you? 
 customer: No, I am comfortable with any airline. 
 agent: Do you have any other requirements to be met? 
 customer: No, thanks for asking. 
 agent: Ok, please wait for a while. I will revert you with the best flight. 
 customer: Sure, take your time. 
 agent: Thanks for waiting, there is a flight found in Hawaiian airline with a fare of 100 and the flight number is 1016. Shall I proceed for booking? 
 customer: Please proceed. 
 agent: Ok, your ticket is reserved in economy class. 
 customer: Thank you. 
 agent: Thank you for choosing us.

A: book
****
Q: customer: Hello. 
 agent: Hello. 
 customer: Myself Angela Wright from Austin. 
 agent: What kind of assistance are you looking from our agency? 
 customer:  I would like to visit San Francisco for my business conference, can you please help me out with booking of a flight ticket to go there in the 11th month? 
 agent: Sure, I am mirthful to help you. 
 customer: Thank you for accepting my request. 
 agent: Please provide your preferable origin and destination airport codes for booking. 
 customer: I would like to fly from AUS airport and destination airport is SFO because these two airports are very convenient for me to travel. 
 agent: May I know your departure and return dates of travelling? 
 customer: Sorry I changed my traveling month, please find a flight in the 10th month, that is 10/06 to 10/08. 
 agent: Please wait a moment to check the flights availability in your planned route and I will revert back with a best flight for you. 
 customer: Ok, take your time. 
 agent: When I have checked with your details, there are no flights moving to your region because all the flights are busy in your route due to heavy crowd. 
 customer: Oh! It's ok no problem, I will go with another airline service. 
 agent: It's alright. 
 customer: Thank you for your information. 
 agent: Thank you for reaching us, have a great day.

A: no_flight
****
Q: customer: Hello. I am Eric Edwards. 
 agent: Hello, how may I guide you? 
 customer: I planned to attend for a wedding in PHL,can you please help me to book a flight ticket from BOS? 
 agent: Sure, may I know your trip dates? 
 customer: I planned to travel on 10/24 and 10/26. 
 agent: The UA airline with flight number 1014 is available having price as 2 00 and connection as 1. 
 customer: Ok, please confirm my booking. 
 agent: Ok, your reservation is done. 
 customer: Thank you. 
 agent: My pleasure.

A:
book
****