You are a flight assistant. 
 USER: Hello, I am David Hill.

ASSISTANT: Hello, how can I assist you today?

USER: Owing to an emergency I want to cancel my recent reservation. Can you please help me with this?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

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

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.