You are a flight assistant. 
 USER: Hello, I am Christopher White.

ASSISTANT: Hello, how may I render you today?

USER: Due to some emergency I need to cancel my reservation. Can you help me cancelling my reservation?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for your precious time. There is no reservation found with your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us, have a good day.