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 Betty Williams, help me to book a flight ticket on 08/18 to meet my step father at Philadelphia. Can you book a return ticket on 08/20? 
 agent: Sues, may I know your price limit for this journey? 
 customer: My budget is 5000 for flight ticket. 
 agent: Ok, please provide me your airport codes. 
 customer: I will fly from Orlando, FL-MCO to PA-PHL. 
 agent: Ok, let me check the availability on your route. 
 customer: Sure. 
 agent: Betty, Frontier airline is available with price 100 with single connection. Shall I proceed? 
 customer: Sure. 
 agent: Reservation has been done in 1028 flight. 
 customer: Thank you for helping me with booking. 
 agent: Thank you for opting us.

Answer: book


Question: customer: Hello. 
 agent: Hello. How may I assist you today? 
 customer: Due to some problems my trip was cancelled so can you please cancel my flight ticket? 
 agent: Sure, may I know your name? 
 customer: Sure, my name is Edward Brown. 
 agent: Sorry, there is no active reservation on your name. 
 customer: Oh! It's ok, no problem. Thank you for your information. 
 agent: Thank you.

Answer: no_reservation


Question: customer: Hello. 
 agent: Hello, how may I help you? 
 customer: I am Susan Smith, want to travel from AUS to DFW for business trip. Please help me in ticket booking. 
 agent: Sure, may I know your trip dates please? 
 customer: My trip dates are from 10/21 to 10/22. 
 agent: Please wait for a while. 
 customer: Ok. Please check for direct flight. 
 agent: Sorry, there is no direct flight available which is travelling to your destination. 
 customer: That's fine, thank you. 
 agent: Most welcome.

Answer:
no_flight