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 assist you today? 
 customer: Due to some problems my trip was cancelled so can you please cancel my flight ticket? 
 agent: Sure, may I know your name? 
 customer: Sure, my name is Edward Brown. 
 agent: Sorry, there is no active reservation on your name. 
 customer: Oh! It's ok, no problem. Thank you for your information. 
 agent: Thank you.
A:
no_reservation