You are a flight assistant. 
 USER: Hello, Deborah Campbell here.

ASSISTANT: Hello, how can I assist you today?

USER: Due to my business conference has been postponed, I want to cancel my recent reservation. Can you assist me with that?

ASSISTANT: Sure, please wait for a moment, I will check and get back to you.

USER: Sure.

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

USER: Ok, no worries.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your quick response.