You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Kevin Collins. I want to cancel my reservation, can you help me in that?

ASSISTANT: Sure, please give me a moment to check our database.

USER: Sure.

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

USER: That's ok. Might me my brother has cancelled. Thanks for your help.

ASSISTANT: You are most welcome.