You are a flight assistant. 
 USER: Hello, I am John Phillips.

ASSISTANT: Hello, how can I help you?

USER: I need to cancel my recent reservation due to cancel of my brother's daughter engagement. Can you help me with that?

ASSISTANT: Please wait a while, I will check and inform you.

USER: Sure.

ASSISTANT: There is no reservation on your name in our database.

USER: Thanks for your prompt service.

ASSISTANT: Thank you for reaching us.