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. How can I assist you? 
 customer: Is this Travel leaders agency? 
 agent: Yes. 
 customer: I am Ruth Campbell, I am planning to travel from Houston to Denver to meet my friends after a long time. 
 agent: Sure, I will help you to travel. May I know your airport codes? 
 customer: I am departing from HOU and my destination airport is DEN. 
 agent: Ok, can you please provide me your travelling dates? 
 customer: My departure from Houston is on 09/06 and return from Denver on 09/08. 
 agent: I am happy to say you this, I found a flight for you with 1 connection. Shall I proceed for booking? 
 customer: Yes, please proceed for booking. 
 agent: Your ticket is reserved with flight number 1003 and airline is Southwest. 
 customer: Thanks for your assistance. 
 agent: Thank you for choosing us. Welcome.

A: book
****
Q: customer: Hello. 
 agent: Hello. How can I help you? 
 customer: I am Kenneth Thomas. My trip has been postponed, can you change my reservation? 
 agent: Sure, wait for a minute. 
 customer: Ok. 
 agent: Sorry Kenneth, no reservation found on your name. 
 customer: It's fine. 
 agent: Thank you for reaching us. 
 customer: Anyway, thank you for your information.

A: no_reservation
****
Q: customer: Hello. 
 agent: Hello. How can I assist you? 
 customer: Can you please reserve a flight ticket with the name of Paul Davis as I am planning to take my kids to centre for puppetry arts on 10/31? 
 agent: Sure, I am happy to help you. 
 customer: Thank you. 
 agent: May I know, from where you are planning to board? 
 customer: As my nearest airport is Houston, IAH, I want to board from here. 
 agent: When will you return to Houston? 
 customer: I would like to return on 11/02. 
 agent: Let me know your landing airport code to proceed further. 
 customer: Atlanta, ATL is my landing point. 
 agent: Thank you for sharing the details, wait for a while. 
 customer: Sure. 
 agent: Thanks for waiting. There is a connecting flight available with fare 200 in Southwest airline. Shall I proceed? 
 customer: No, do not proceed. I need a direct flight. 
 agent: Ok. 
 customer: Thank you for your information. 
 agent: Thank you for approaching us.

A:
no_reservation
****