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: Hello. 
 agent: Hello. 
 customer: I am Angela Baker. 
 agent: How may I aid you today? 
 customer: Can you find a flight from HOU to SEA, to visit the Chihuly Garden and Glass. 
 agent: Sure, I am here to help you out. Please provide me your trip dates. 
 customer: Help me with booking ticket from 08/20 and 08/22. 
 agent: Sure  Angela Baker, there is a flight with 1 stop and price is 100 in economy class, can I proceed with it? 
 customer: Yes, please. 
 agent: Your ticket has need with 1014 flight in Delta airlines. 
 customer: Thanks for your help. 
 agent: Thank you for reaching us.

A: book
****
Q: customer: Hi. 
 agent: Hello, welcome to flight booking agency. 
 customer: Myself Emma Thomas here. 
 agent: How may I guide you for today? 
 customer: I want to travel from AZ-PHX to CO-DEN, can you please help me to book a flight ticket? 
 agent: Sure, can you please share on what dates you are willing to travel? 
 customer: Sure, my planning of travel is from 03/30 to 04/01. 
 agent: Please give me a minute, I will look for the best airlines on this route. Sorry, there is no flight available on your requested dates. 
 customer: Ok, that's fine. 
 agent: Thank you for reaching us. 
 customer: Welcome. 
 agent: Have a great day.

A: no_flight
****
Q: customer: Hi. 
 agent: Hello. How may I aid you? 
 customer: I am Anna Hill, want to travel from ATL to LGA. Please help me in booking my ticket. 
 agent: Sure, on which dates you are planning to travel? 
 customer: Sure, my trip dates are from 09/29 to 10/01. 
 agent: Sure, please wait a minute. 
 customer: Ok. 
 agent: Thanks for waiting, we found a flight with your provided information in Frontier airline with 0 connection and the fare is 200. Shall I confirm your ticket with this airline? 
 customer: Please proceed with the booking. 
 agent: Your ticket is booked in 1022 flight. 
 customer: Thank you for your help. 
 agent: Most welcome.

A:
book
****