You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Elizabeth Green.

ASSISTANT: How may I serve you?

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

ASSISTANT: Sure, please be on hold.

USER: Sure.

ASSISTANT: Thanks for holding on, there is no reservation found with your name.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for approaching us.