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
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Question: customer: Hello, I am Kathleen Campbell. 
 agent: Hello, how can I help you today? 
 customer: I want to book a ticket from HOU to DFW to surprise my friend on her birthday. Can you please help me to book a ticket on 06/28? 
 agent: Sure, we are here to help you. May I know the return date of your journey? 
 customer: My return journey date is 06/30. 
 agent: May I know is there any connection limit? 
 customer: I need only one connection limit. 
 agent: Ok, please wait for a while. 
 customer: Ok. 
 agent: Thanks for waiting. Sorry for the inconvenience, we have a direct flight with AA airline. 
 customer: Ok, Do not proceed for booking. 
 agent: Ok. 
 customer: Thanks for your assistance. 
 agent: Thanks for choosing us.

Answer: no_flight


Question: customer: Hello. 
 agent: Hello, may I know your name please? 
 customer: Yes, myself Sandra Taylor. 
 agent: How can I help you? 
 customer: I want to book a flight ticket from DEN to DCA. 
 agent: May I know your travelling dates please? 
 customer: I want travel in the dates of 12/10 and 12/12. 
 agent: Sorry Sandra, there are no flights available regarding your journey. 
 customer: Ok, thank you for your information. 
 agent: Thank you and have a nice day.

Answer: no_flight


Question: customer: Hello. 
 agent: Hello, how may I assist you? 
 customer: I am Barbara Adams, can you book a ticket from PHL to DCA? 
 agent: Sure, may I know your travel dates please? 
 customer: I am planning to start on 12/16 and return on 12/18. 
 agent: Ok, hold on for a moment. Let me check the best flight for you. 
 customer: Make sure that connection limit is 1. 
 agent: I found a flight for you with JetBlue airline and it costs you 200. Shall I proceed? 
 customer: Please proceed. 
 agent: Your ticket has been confirmed with 1005 flight number. 
 customer: Thank you for booking. 
 agent: Welcome.

Answer:
book