You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your name?

USER: I am Debra Clark.

ASSISTANT: How can I assist you?

USER: As my reporting date got postponed, I would like to cancel my reservation. Can you help me with that?

ASSISTANT:  Sure, I can  help you out. Please wait for a minute.

USER: Ok.

ASSISTANT: Thanks for your time. We didn't any reservation by this name.

USER: No issues, thank you for your response.

ASSISTANT: Thank you for opting us.