You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER:  I would like to cancel my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, I will help you. May I know your name?

USER: Samuel Campbell.

ASSISTANT: Thank you. Please wait for a while, let me check your reservation status.

USER: Ok.

ASSISTANT: Sorry, no reservation found under your name in our database.

USER: Not an issue, thank you for the information.

ASSISTANT: You are most welcome.