You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi. How can I help you?

USER: Suddenly, I meet with an accident.So, I want to cancel my reservation. Can you help me? Myself Alexander Green.

ASSISTANT: Sure, just a second please.

USER: Ok.

ASSISTANT: I am Sorry Mr. Alexander Green, no reservation found on your name.

USER: That's ok. Thank you for your information.

ASSISTANT: Thank you for reaching us.