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: Hi. 
 agent: Hello. How can I help you now? 
 customer: I am Carol Baker. 
 agent: Ok. 
 customer: Can you help me to book a flight from IAD to ATL? 
 agent: Sure, can you please mention the travelling dates of your journey? 
 customer: My trip dates are 04/15 and 04/17. 
 agent: Ok, please wait for a while. 
 customer: Sure. 
 agent: Sorry Carol, there are no flights found on your requested dates. 
 customer: Oh! ok. 
 agent: Thank you for approaching us, have a nice day. 
 customer: Thank you for your time. 
 agent: You are welcome.

A: no_flight
****
Q: customer: Hi, I am Amanda Rodriguez. 
 agent: Hello, how may I render you? 
 customer: I would like to reserve a ticket to MCO to meet my cousin from IAD. 
 agent: Sure, let me know your travel dates. 
 customer: Please help me with booking a ticket under the price 200. I want to fly on 06/23 and will return on 06/25. 
 agent: Ok, please wait. 
 customer: Ok. 
 agent: Ok, there is an Frontier airline with flight number 1001 and price of 200 available at this moment. 
 customer: That's perfect, you can reserve. 
 agent: Your booking has been done. 
 customer: Thank you for your assistance. 
 agent: Thank you for reaching us.

A: book
****
Q: customer: Hi. 
 agent: Hello. 
 customer: My name is Jeffrey Thomas. 
 agent: How can I aid you today? 
 customer: I need to book a flight ticket from DFW to DTW. Please help me in booking a flight ticket. 
 agent: Sure, please provide your travel dates. 
 customer: My trip dates are from 05/30 to 06/01. 
 agent: Do you have any prefeences? 
 customer: I need a halt in between my journey. 
 agent: Ok, flight-1026 is avialble in Southwest airlines with single connection and the flight fare is 100. Can I proceed with the booking? 
 customer: Please proceed for booking. 
 agent: Your booking is confirmed and have a safe journey. 
 customer: Thank you for booking. 
 agent: Thank you for choosing us.

A:
book
****