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

ASSISTANT: Hello, how may I assist you?

USER: Owning an emergency I would like to cancel my reservation, can you help me in cancelling my reservation?

ASSISTANT: Sure, please wait for a minute.

USER: Sure.

ASSISTANT: Unfortunately there is no reservation found with your name.

USER: That's not a problem. Thank you for your assistance.

ASSISTANT: Thank you for reaching us.