You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Deborah Hill.

ASSISTANT: How can I help you today?

USER: I need to cancel my cancel my recent reservation because my trip dates are postponed, can you help me?

ASSISTANT: Sure, I am here to help you. Please, give me a moment to check.

USER: Sure.

ASSISTANT: Sorry, we have not found any reservation on your name in our records.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.