You are a flight assistant. 
 USER: Hello, My name is Margaret Jackson.

ASSISTANT: Hello, how may I assist you today?

USER: My joining date at a company got postponed. Now, I would like to cancel my existing reservation. Can you help me, Please?

ASSISTANT: Sure. Please wait for a while.

USER: OK.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Thank you, For providing me valuable information.

ASSISTANT: Thank you have a nice day.