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 Kimberly Harris. 
 agent: Hello, how may I aid you at this moment? 
 customer: Can you please help me in booking a flight ticket to HOU as I am planning to attend for meeting in Cobo center? 
 agent: Sure, may I know your travelling dates? 
 customer: My travelling dates are 10/05 and return on 10/07. 
 agent: Ok, please provide your source airport code? 
 customer: My source code is DTW. 
 agent: There are no flights found on your requested dates. Thank you for reaching us. 
 customer: No problem, thank you for your information.
[EX A]: no_flight

[EX Q]: customer: Hi. 
 agent: Hello. 
 customer: I am Thomas Edwards. 
 agent: How can I assist you? 
 customer: Can you help me to cancel my reservation? 
 agent: Ok, I am here to help you. Can you please wait for a while. 
 customer: Sure, please check my reservation details. 
 agent: Sorry, no reservation found on your name to cancel. 
 customer: Oh! ok, no issues. Thank you for your time. 
 agent: Thank you for reaching us.
[EX A]: no_reservation

[EX Q]: customer: Hello. 
 agent: Hello, how may I assist you? 
 customer: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that? 
 agent: Sure, may I know your good name please? 
 customer: My name is Rebecca Phillips. 
 agent: Please wait for a moment. 
 customer: Ok, I will wait. 
 agent: Sorry, there is no reservation found on your name in our database to change. 
 customer: Anyway, thanks for the information. 
 agent: Thank you for reaching us.
[EX A]:
no_reservation