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, I am Timothy Campbell. 
 agent: Hello, what can I do for you today? 
 customer: I am planning to travel to New York to celebrate my cousin birthday. Can you make a reservation with a single connection? 
 agent: Sure, could you please share your travelling dates? 
 customer: Sure, I need to fly on 06/09 and 06/11. 
 agent: Ok, may I know your near by airport codes? 
 customer: Sure, I need to deviate from Austin AUS. 
 agent: Kindly mention your destination airport code? 
 customer: Sure, my landing point is LGA. 
 agent: There are no flights found on your requested dates. 
 customer: Ok, not an issue. 
 agent: Thank you for reaching us. 
 customer: Thank you for your information.
Example Output: no_flight

Example Input: customer: Hi. 
 agent: Hello. How can I help you? 
 customer: My name is Ronald Martin. I need to book a flight ticket from ORD to DCA. Please help me in booking a flight ticket. 
 agent: Sure, I will help you with it. 
 customer: Thank you. 
 agent: May I know when are you willing to travel? 
 customer: My journey dates are from 12/06 to 12/08. 
 agent: Do you prefer a halt between your journey? 
 customer: Yes, I prefer a halt. 
 agent: Please let me know if you have any other preferences? 
 customer: No, I do not have any other preference. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: I am sorry to inform you that there is no flight available on given dates from you. 
 customer: No problem, thanks for your information. 
 agent: Thank you for reaching us, we hope to serve you better next time.
Example Output: no_flight

Example Input: customer: Hi. 
 agent: Hello, how can I render you today? 
 customer: I am Melissa Philips. 
 agent: Ok. 
 customer: I would like to watch largest and most complete view of our milky way in galaxy wall at Grainier sky theatre which is located at Chicago, IL - ORD. Will you help me in booking a flight ticket with single connection? 
 agent: Sure, I would be happy to help you. 
 customer: Thank you. 
 agent: Can you please provide your take off airport code? 
 customer: My boarding airport code is WA - SEA. 
 agent: May I know how much do you want to spend on flight ticket? 
 customer: I can spend up to 5000. 
 agent: May I know when you have planned to travel? 
 customer: My planned travel dates are 10/02 and 10/04. 
 agent: Ok, please wait a moment, let me search a flight for you. 
 customer: Sure. 
 agent:  Thanks for your precious time. We found Spirit airline fare of 100. Shall I proceed for booking with single stopover flight? 
 customer: Ok. 
 agent: Your ticket has been confirmed with airline number 1029. 
 customer: Thank you. 
 agent: Thank you for choosing us.
Example Output:
book