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

Example Input: customer: Hi. 
 agent: Hello, how may I aid you? 
 customer: I am Stephen Young. I am planning to visit some new places at Orlando, help me in booking my flight ticket with one halt. 
 agent: Sure, can you please share your travelling dates? 
 customer: My travelling dates will be 12/26 to 12/28. 
 agent: May I know your airport codes? 
 customer: I would like to start my journey from TX-DFW. My landing airport will be FL-MCO. 
 agent: Thanks for providing your details. Unfortunately there are no flights found with your requirements. 
 customer: Its ok, thank you for your assistance. 
 agent: Thank you for choosing us.
Example Output: no_flight

Example Input: customer: Hello, I am Ruth Perez. 
 agent: Hello, How can I help you today? 
 customer: I love to do adventures as if now I would like to do Scuba diving in Shadow Cat Adventures at Phoenix, AZ-PHX. Can you please book a good reservation for me? 
 agent: Sure. Can you please provide your journey dates and origin code? 
 customer: I will start from New York, NY-JFK on 07/14. My returning day is on 07/16. 
 agent: Ok, please wait for a minute, I will check and get back to you. 
 customer: Ok. 
 agent: We found an Delta airline flight, with number 1004. The price is 200, with 1 connection. 
 customer: You can proceed for booking. 
 agent: Ok, your ticket has been booked with flight number 1004. 
 customer: Thanks for your service. 
 agent: Thanks for availing us.
Example Output: book

Example Input: customer: Hi. 
 agent: Hello. How can I help you? 
 customer: I want to book a ticket from DCA to CLT, can you help me? 
 agent: Yes, I can help you. Could you share me your travelling dates? 
 customer: My travel dates are 06/14 and 06/16. 
 agent: Give me a moment. 
 customer: Ok. 
 agent: I have found a flight ticket with a price of 200 and 1 connection. 
 customer: Book the ticket in the name of Catherine Roberts. 
 agent: Ok, your ticket is booked. 
 customer: Thank you for booking. 
 agent: Thank you for consulting us.
Example Output:
book