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. 
 agent: Hello, how may I help you? 
 customer: I am Mary Walker. I want to visit Titanic the aircraft exhibition at MCO, can you please book a ticket for me? 
 agent: Sure, we are here to help you. May I know your planned dates of travelling? 
 customer: My trip dates are 10/29 to 10/31. 
 agent: May I Know your boarding point? 
 customer: Source: PHX. 
 agent: Thank you for the details. Please be on hold. 
 customer: Sure. 
 agent: I found a flight with number 1024 and Delta airline. Shall I proceed? 
 customer: You can proceed. 
 agent: Your flight ticket has been booked with single connection and fare of 200. 
 customer: Thank you. 
 agent: Thank you for reaching us.

Answer: book


Question: customer: Hello. 
 agent: Hello. How can I assist you? 
 customer: I am Jennifer Clark. I am planning to visit my cousin's home at Philadelphia. Can you please book a ticket from SFO to PHL? 
 agent: Sure, please provide your travel dates. 
 customer: I would like to travel on 06/30 and return back on 07/02. 
 agent: The flight 1025 of Spirit airlines is available on your requested dates with a price of 100. Shall I proceed? 
 customer: Yes, you can proceed the booking. 
 agent: Clark, your reservation has done successfully. 
 customer: Thank you for your service. 
 agent: You are welcome.

Answer: book


Question: customer: Hi. 
 agent: Hello. How can I assist you today? 
 customer: I booked a flight ticket in your agency for my holiday trip to Houston but now I want a change in the travel dates. So can you go ahead and change my flight ticket? 
 agent: Sure, may I know your name to check for the previous reservation? 
 customer: I am Timothy Mitchell. 
 agent: Please allow me a moment. 
 customer: Sure. 
 agent: Timothy Mitchell, there is no reservation found under your name. 
 customer: Ok, not a problem. Thanks for your information. 
 agent: Thank you for contacting us.

Answer:
no_reservation