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

Input: Consider Input: 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.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello. How may I assist you today? 
 customer: Can you please help me to search a flight with 0 connection limit? 
 agent: Sure, I will help you with that, please share your airport codes? 
 customer: Thank you, the airport codes are from NY-LGA to IL-ORD. 
 agent: Ok, let me know your travelling dates? 
 customer: The travelling dates are 09/22 to 09/24. 
 agent: May I know your name please? 
 customer: Sure, my name is Catherine Rodriguez. 
 agent: Sorry Catherine, no flights as per your details. 
 customer: Ok, no problem. 
 agent: Thank you for reaching us. 
 customer: Thank you for your information.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I guide you? 
 customer: Jacob Roberts here. 
 agent: Nice meeting you Jacob. 
 customer:  I am event organiser and there is a marriage event in ORD, so I need to travel there, can you help in searching a flight from MCO? 
 agent: Sure, I am here to help you? May I know your dates? 
 customer: My trip dates are from 08/08 to 08/10. 
 agent: Please wait for a while to check it. 
 customer: Sure, take your time. 
 agent: As per your request there is a flight with drop of connections 2 and the fare is 100. Shall I confirm your booking? 
 customer: No, I want a direct flight. 
 agent: Sorry Jacob, we cannot provide you a direct flight on your dates because they are busy in travelling. Hope you can understand that one. 
 customer: That's fine. 
 agent: Thank you for approaching us, have a nice day. 
 customer: Thanks and wish you the same. 
 agent: Welcome.
Output: no_flight