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

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my recent reservation due to my business meeting got postponed. Can you be my helping hand?

ASSISTANT: Sure. Please wait a minute, I will check and revert to you.

USER: Sure.

ASSISTANT: Sorry no reservation found on your name.

USER: That's ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your response.