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. 
 agent: Hello. How may I render you at this moment? 
 customer: Can you please help me with cancelling my recent reservation? 
 agent: Sure, may I know your good name please? 
 customer: My name is Gregory Jackson. 
 agent: OK, please wait for few minutes. 
 customer: Ok. 
 agent: There is no recent reservation found on your name in our records. 
 customer: That's ok, thank you. 
 agent: Thank you for reaching us.

Ex Output:
no_reservation


Ex Input:
customer: Hello. 
 agent: Hello. 
 customer: I am Gregory Carter. 
 agent: How may I help you today? 
 customer: Can you please reserve me a flight ticket which is having it's depart time in the afternoon and return in the afternoon? 
 agent: Sure, let me know your travel dates please? 
 customer: I have planned to travel on Jan 11th and return on Jan 13th. 
 agent: Could you please share me your airport codes? 
 customer: I would like to fly from EWR to MCO. 
 agent: Ok, is there any class preference? 
 customer: I prefer connecting flight. 
 agent: Do you need any airline preference? 
 customer: No. 
 agent: Please wait for a while. 
 customer: Ok. 
 agent: Jet Blue airlines is providing a connecting flight with the ticket fare of 100 and depart time is 14:00 PM, arrival time is 16:00 PM. Shall I proceed? 
 customer: Ok, please book this ticket. 
 agent: Your ticket has been confirmed by flight number 1025 and an economy class. 
 customer: Thank you. 
 agent: Thanks for choosing us.

Ex Output:
book


Ex Input:
customer: Hello. 
 agent: Hello, how may I help you? 
 customer: I am George Hall, want to travel from IAH to SFO>. 
 agent: May I know your trip dates? 
 customer: My travel dates are from 06/05 to 06/07. Please check the flight with 1 connection. 
 agent: There is no reservation found under your name. 
 customer: It's ok, thank you. 
 agent: Most welcome.

Ex Output:
no_flight