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 Shirley Martinez. 
 agent: Hello, how can I serve your today? 
 customer: I want to visit HOU from my hometown PHL, can you help me with single connection of flight? 
 agent: Sure, may I know your travelling dates? 
 customer: My depart is on 04/26 and return on 04/28. 
 agent: please mention your connections. 
 customer: I need a lay by in between journey. 
 agent: There is a Frontier 1002 with fare of 100 which matches your travelling dates. Shall I proceed with booking? 
 customer: OK, proceed with booking. 
 agent: Your booking has been confirmed on name of Shirley Martinez. 
 customer: Thank you for the help. 
 agent: Thank you for approaching us.

A: book
****
Q: customer: Hello. 
 agent: Hello, how may I help you? 
 customer: Can you please reserve me a flight ticket from IAD to DTW? 
 agent: Are you fine with connecting flight? 
 customer: Yes, I am ok with connecting flight. 
 agent: Sure, can you please specify me your dates of travel? 
 customer: Sure, my travel dates are from May 16 to May 18. 
 agent: May I know your specifications? 
 customer: No more specifications. 
 agent: Let me know your name? 
 customer: Myself Ruth Nelson. 
 agent: Sorry to say, no flight is available for you. 
 customer: That's ok, no problem. Thank you for the information. 
 agent: Thank you for reaching us.

A: no_flight
****
Q: customer: Hello, I am James Phillips. 
 agent: Hello, how may I serve you today? 
 customer: I have a meeting with my office heads at Benaroya hall on  which is at Seattle. Please help me in booking from IAH to SEA? 
 agent: Sure, can you please share your budget for ticket? 
 customer: I can bare only 200. 
 agent: Do you need any layby in between journey? 
 customer: I need a direct flight. 
 agent: Please specify your assign dates of travelling? 
 customer: My journey dates are 10/17 to 10/19. 
 agent: Ok, please wait a moment. 
 customer: Ok. 
 agent: Thank you for your time, sorry, no flights available on that day. 
 customer: Ok, no issues. Thank you for your help. 
 agent: Thank you for reaching us.

A:
no_flight
****