You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I am Deborah Lewis. I need to cancel my reservation because my friend met with an accident. Can you help me?

ASSISTANT: Sure, I will help you. Please wait a moment.

USER: Sure.

ASSISTANT: Sorry there is no reservation found in your name.

USER: No problem, thank you.

ASSISTANT: Thanks for choosing us.