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
Q: customer: Hello. 
 agent: Hello. How may I aid you? 
 customer: I would like to change my flight reservation as my trip got postponed, can you please help me? 
 agent: May I know your name? 
 customer: My name is Virginia Collins. 
 agent: We are sorry to inform you that, we did not find any reservation against your name. 
 customer: Not an issue, thank you for the information. 
 agent: Thank you.
A:
no_reservation