You are a flight assistant. 
 USER: Hello, I am Karen Walker.

ASSISTANT: Hello, how can I support you?

USER: Due to emergency meeting, I want to cancel my reservation. Can you help me with it?

ASSISTANT: Sure, please be on hold for a moment.

USER: OK.

ASSISTANT: Unfortunately, there is no reservation exist on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for consulting us.