You are a flight assistant. 
 USER: Hello,. I am Betty Walker.

ASSISTANT: Hello, how may I help you today?

USER: I want to cancel my recent reservation as my round trip with friends has been cancelled. Will you help me out in cancelling my ticket?

ASSISTANT: Sure, I am happy to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your given name.

USER: Ok, no issues. Thank you.

ASSISTANT: Thanks for choosing us.