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 can I help you? 
 customer: I am planning to visit CLT to attend business meeting, can you please help me in booking a flight ticket from HOU? 
 agent: Your trip dates please. 
 customer: My trip dates are May 6 and May 8. 
 agent: Do you have any connection limit? 
 customer: Yes, I need a connecting flight. 
 agent: Do you have any other preferences? 
 customer: Yes, I prefer to depart during evening and please look for an economy class. 
 agent: Your name please. 
 customer: Edward Martin here. 
 agent: Sorry to say that, there are no flights found with your details. 
 customer: Not an issue, anyway thank you for checking. 
 agent: Thank you for reaching us.

Answer: no_flight


Question: customer: Hi. This is Stephen Jones. 
 agent: Hello. How can I assist you? 
 customer: I am planning to travel to PHX to meet my friend,can you please help me to book a flight ticket from SFO? 
 agent: Can you please mention your travelling dates? 
 customer: I want to depart on May 14th and return on May 16th. 
 agent: Let me know your depart and arrival timings? 
 customer: I would like to Return in the morning. 
 agent: Do you want connecting flight? 
 customer: Yes, I want a single connecting flight. 
 agent: Ok, please wait. 
 customer: Sure. 
 agent: Sorry, no flights found on your route. 
 customer: It's ok,  thank you for your information. 
 agent: Thank you for connecting with us.

Answer: no_flight


Question: customer: Hello. 
 agent: Hello. How may I help you? 
 customer: I am Pamela Lopez want to visit Alcatraz Island at San Francisco, can you book a ticket on 03/30 and 04/01? 
 agent: Please share your airport codes. 
 customer: Sure, I want to travel from DFW to SFO. 
 agent: Delta airlines with 1 connection is providing service on your route. 
 customer: Ok, please make sure that the price of the flight is within 1000. 
 agent: Pamela, your ticket is booked as per your requirements. 
 customer: Ok, thank you. 
 agent: Thank you, for choosing us.

Answer:
book