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

Ex Input:
customer: Hi, I am Mark Jones. 
 agent: Hello, how can I help you? 
 customer: Owing to an emergency, my boxing championship has been postponed. So I have a request to you to change my existing reservation? 
 agent: Sure, wait for some time. 
 customer: Sure. 
 agent: Thanks for waiting there is no reservations found on your name. 
 customer: Ok, no issues at all. Thanks for your assistance. 
 agent: Thanks for choosing us.

Ex Output:
no_reservation


Ex Input:
customer: Hello. 
 agent: Hello, how can I assist you? 
 customer: I want to cancel my reservation as my project got ramp down. Can you help me with that? 
 agent: Sure, may I know your name? 
 customer: I am Mary Martin. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: Thank you for your valuable time, we found reservation on your name and cancelled successfully, amount will refund to your registered bank account within 3 working days. 
 customer: Thank you. 
 agent: Thank you for opting us.

Ex Output:
cancel


Ex Input:
customer: Hello. 
 agent: Hello. 
 customer: Steven Scott here. 
 agent: How may I aid you at this moment? 
 customer: I'm planning to meet my friend, please book a ticket from LAS to ORD. 
 agent: Sure, please share your travelling dates. 
 customer: Sure, my planned departure and return travel dates are 17th and 19th of January. 
 agent: Ok, do you need any lay by in between the journey? 
 customer: I'm looking for flights with 1 connection. 
 agent: Ok, may I know your class preference? 
 customer: I don't have any class preference but my depart time must be afternoon and return time must be evening. 
 agent: Ok, do you have any other preferences? 
 customer: No, I don't have any other specifications more than that. 
 agent: There are no flights found on your requested dates. 
 customer: That's ok, thank you for your information. 
 agent: Thank you for reaching us.

Ex Output:
no_flight