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

Example Input: customer: Hello, I am Larry Campbell. 
 agent: Hello, how can I help you? 
 customer: I want to meet my college friend at San Francisco, SFO. 
 agent: Ok. 
 customer: Can you help me in booking with a connecting flight? 
 agent: Sure, we are mirthful to help you. 
 customer: Thank you. 
 agent: Can you please let me know your journey dates? 
 customer: My travelling dates are from 10/23 to 10/25. 
 agent: What is your take off airport code? 
 customer: I am boarding at Boston, BOS. 
 agent: Please wait a minute, I will search a flight for you. 
 customer: Sure. 
 agent: Thanks for your time. 
 customer: Ok. 
 agent: Unfortunately, there are no flights found on your route. 
 customer: Ok, No problem. Thanks for the information. 
 agent: Thank you for choosing us.
Example Output: no_flight

Example Input: customer: Hi. 
 agent: Hello. How may I assist you? 
 customer: Owing to an emergency I had to request for this change reservation. 
 agent: Ok, I will help you with that. Can I have your name , please? 
 customer: My name is Anna Young. 
 agent: Hold on a moment. 
 customer: Sure. 
 agent: I am sorry, there is no reservation found on your name to change. 
 customer: Thank you. 
 agent: Thank you for availing us.
Example Output: no_reservation

Example Input: customer: Hello. 
 agent: Hello, how can I aid you for today? 
 customer: Can you book a connecting flight from OAK to DFW? 
 agent: I am here to help you in booking your flight ticket. Can you please provide your planned dates of journey? 
 customer: July, 12 and July, 14 are my travel dates. 
 agent: Do you have any preference about the connection limit for your journey? 
 customer: I prefer to connecting flight. 
 agent: Do you have any other requirement to met with for your journey? 
 customer: I need to return at evening time. 
 agent: Can you please provide your name for further proceeding? 
 customer: Andrew Baker here. 
 agent: Sorry to say this Andrew Baker, I am not able to find any flights which travels to your region. 
 customer: That's ok, no problem. Thank you. 
 agent: You are welcome, thank you for reaching us.
Example Output:
no_flight