Detailed Instructions: 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
Problem:customer: Hi. 
 agent: Hello, good morning. Welcome to flight booking agency, which service you would like to have from my end? 
 customer: I have some important work in Houston, so I would like to cancel my recent reservation so can you help me with this? 
 agent: Sure, I am here to help you. Please wait for a moment to check your reservation details in my records. 
 customer: Good to hear this. 
 agent: Meanwhile, may I know your name to check? 
 customer: Sure, my previous reservation booked under the name of Virginia Williams. 
 agent: Thank you for waiting. No reservation found on your name in my database. 
 customer: Oh! It's ok, I think my sister already cancelled my reservation. 
 agent: Ok, sorry for inconvenience. 
 customer: Anyway thank you for your services. 
 agent: Thank you for choosing us, hope we will get an opportunity to serve you in future. 
 customer: You are welcome. 
 agent: You are welcome.
Solution:
no_reservation