You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: Alexander Mitchell here.

ASSISTANT: Yes, Mitchell.

USER: I met with a minor accident. So, I can not take the flight. Can you cancel my reservation?

ASSISTANT: So sad! I will help you in that, please wait for a while.

USER: Sure.

ASSISTANT: There is no reservation found under your name, Mitchell.

USER: It's fine. Anyway, thank you for your help.

ASSISTANT: Thank you for choosing us.