You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: I am Deborah Clark. Owing to an emergency I want to cancel my reservation, can you help me?

ASSISTANT: Sure, please allow me a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation with your name to cancel.

USER: No problem, thanks for checking.

ASSISTANT: You are welcome.