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

Q: customer: Hello. 
 agent: Hello. How may I assist you? 
 customer: My name is Anthony Scott. Owing to an emergency, I want to cancel my reservation. 
 agent: Sure, I will help you. Please wait for a while. 
 customer: Sure. 
 agent: Thanks for waiting. There was no reservation found on your name. 
 customer: No problem, thank you for your help. 
 agent: Thank you for choosing us.

A: no_reservation
****
Q: customer: Hello. 
 agent: Hello. 
 customer: I am Timothy Martin. 
 agent: How may I help you? 
 customer: I need to book a flight ticket from New York, NY-EWR to Boston, MA-BOS. 
 agent: Sure, help me with the travel dates? 
 customer: I want to travel on dates 10/16 and 10/18. 
 agent: We do not found any flights running in your preferred routes. 
 customer: No problem, thank you for your help. 
 agent: Thank you for opting us.

A: no_flight
****
Q: customer: Hello. 
 agent: Hello, how can I guide you for today? 
 customer: Can you help me to book a business class flight ticket? 
 agent: Can you please share on what dates you are willing to travel? 
 customer: My travel dates are May 05 and May 07. 
 agent: Can you please provide your source and destination airport codes? 
 customer: My airport codes are DEN and MSP. 
 agent: Do you have any airline preferences? 
 customer: I am comfortable with any airlines. 
 agent: Are you looking for a connecting flight or direct flight? 
 customer: I am looking for connecting flight. 
 agent: Do you have any other requirements that you are looking for? 
 customer: No, thanks for asking. 
 agent: Can you please provide your name to proceed further? 
 customer: My name is Thomas Scott. 
 agent: Sorry, there are no flights available at your request. 
 customer: No problem, thank you for the information. 
 agent: Thank you for contacting us, have a nice day.

A:
no_flight
****