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: 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.

A: no_flight
****
Q: customer: Hi, I am Kimberly Nelson. 
 agent: Hello, How can I help you today? 
 customer: I am one of the best hacker in my company, unfortunately my Las Vegas, NV - LAS branch websites was hacked by some one so they called me to solve that problem. Can you help me to book a connecting flight? 
 agent: Sure, can you please share me your travel dates? 
 customer: I want to fly on 01/10 and recur on 01/12. 
 agent: Ok, please wait a moment. 
 customer: Sure. 
 agent: Can you please share me your airport code? 
 customer: I want to board from Washington DC - DCA. 
 agent: Ok, please wait  a moment. 
 customer: Sure. 
 agent: Sorry to say, no flights found with your requirement. 
 customer: Ok, thank you. 
 agent: Thanks for reaching us.

A: no_flight
****
Q: customer: Hello. 
 agent: Hello, What kind of help are you expecting from our side? 
 customer: I would like to change my existing reservation because my trip dates are got postponed, can you help me? 
 agent: Sure, I can change your reservation right now. Before that I need to know your good name please? 
 customer: I am Jerry Roberts. 
 agent: Thanks for providing your name, Please stay online, I will check the previous list and revert to you. 
 customer: Sure, take your own time. 
 agent: Thanks for remaining so positive, We are sorry to specify that there is no active reservation found on your name. 
 customer: That's ok, thank you for checking. 
 agent: Thank you for your presence. We hope to serve you again.

A:
no_reservation
****