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

[EX Q]: customer: Hello, I am Lisa Rodriguez. 
 agent: Hello Lisa Rodriguez, how can I support you? 
 customer: Due to heavy rain, I want to cancel my reservation. Can you help me? 
 agent: Sure, we will help you. Please wait for a minute. 
 customer: Sure. 
 agent: Thanks for your time, no reservation was found based on your name. 
 customer: No issue, Thank you. 
 agent: Thanks for opting our service.
[EX A]: no_reservation

[EX Q]: customer: Hello. 
 agent: Hello. 
 customer: I am Christopher Taylor. 
 agent: How can I help you? 
 customer: I planned to meet my cousin in DCA, can you please help me to book a flight ticket from PHL? 
 agent: Sure, can you please tell your travelling dates? 
 customer: I planned to travel on 02/18 and 02/20. 
 agent: Sorry, there are no flights available with your requested details. 
 customer: Ok, no problem. Thank you for your time. 
 agent: Thank you and have a nice day.
[EX A]: no_flight

[EX Q]: customer: Hello. 
 agent: Hello, how can I assist you? 
 customer: I need to change my reservation as my plan to go for trekking got postponed. Can you help me? 
 agent: Sure, may I know your name to check your reservation from our database? 
 customer: I am Ryan Campbell. 
 agent: We regret to inform you that there is no reservation found on your name to change. 
 customer: Ok fine, thanks for your assistance. 
 agent: Thank you for opting us.
[EX A]:
no_reservation