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, I am Paul Gonzalez. 
 agent: Hello, in what way I can be at your service? 
 customer: I want to meet my old collage friends at Boston, can you please book me a ticket? 
 agent: Sure, can I have your airport codes? 
 customer: My airport codes are from IAH to BOS. 
 agent: Ok, when are you planning to travel? 
 customer: I would like to leave between 07/14 and 07/16. 
 agent: Do you have any other preferences? 
 customer: I need a connecting flight. 
 agent: Sorry to inform you Paul Gonzalez, no airline is providing service on your route. 
 customer: Ok, no problem. Thank you. 
 agent: Thank you for choosing our service.

A: no_flight
****
Q: customer: Hello. 
 agent: Hello, how may I serve you at this moment? 
 customer: Myself Kenneth Parker, I have to attend my friend marriage at Charlotte. Can you please help me in reserving the ticket from MCO to CLT? 
 agent: Sure, I will help you. Please send your travelling dates. 
 customer: I am willing to leave on Oct 02 and again I will rertrieve on Oct 04. 
 agent: Do you have any limitations? 
 customer: I mostly prefer for single connection. Can you please check for this? 
 agent: There is a direct flight available with AA airline, shall I book it? 
 customer: Yes, please go ahead and reserve the ticket. 
 agent: Your booking is done with flight number 1026. Happy journey. 
 customer: Thank you very much for reserving the ticket. 
 agent: You are welcome, have a nice day.

A: book
****
Q: customer: Hello,. 
 agent: Hello. 
 customer: I am Kenneth Harris. 
 agent:  How can I help you? 
 customer: I want to change my existing reservation due to some issues, can you please help me with that? 
 agent: OK, please wait I will revert you. 
 customer: Ok. 
 agent:  Sorry, no reservation was found on your name. 
 customer: Ok, no issues. 
 agent:  Thank you for availing us. 
 customer: Thanks for your information.

A:
no_reservation
****