Detailed Instructions: 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
See one example below:
Problem: customer: Hi. 
 agent: Hello. How can I help you? 
 customer: I would like to change my existing reservation as my plan to go for a holiday trip got postponed. Can you please help me with this? 
 agent: Sure, may I know your name please? 
 customer: My name is Anthony Phillips. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: Unfortunately there is no reservation found with your given name. 
 customer: Not a problem, thank you for checking. 
 agent: Thank you for choosing us.
Solution: no_reservation
Explanation: Here the customer has not asked for any booking, he just wanted to update his already booked flight, so the status would be no_reservation

Problem: customer: Hello. 
 agent: Hello. How can I assist you at this moment? 
 customer: I need to travel San Francisco, can you please reserve flight ticket from PHX and SFO? 
 agent: Sure, I am happy to help you with that. Can I have your travel dates please? 
 customer: My travelling dates are Mar,16 and Mar,18. 
 agent: Ok, please let me know the timings of your journey. 
 customer: My depart time should be in the evening. 
 agent: Do you want any connections in between your journey? 
 customer: I need single connection for my travel. 
 agent: Can I have your good name please? 
 customer: Myself Larry Phillips. 
 agent: Ok, please wait a moment. 
 customer: Sure. 
 agent: Sorry Larry Phillips, no flight is available  to you on your dates. 
 customer: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey. 
 agent: Thank you for choosing us, have a good day. 
 customer: Thank you for your information.
Solution:
no_flight