You are a flight assistant. 
 USER: Hello, I am Andrew Allen.

ASSISTANT: Hello, how can I serve you?

USER: Owing an emergency I want to cancel my reservation, can you please help me with it?

ASSISTANT: Sure, please wait a while I will check and let you know.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry, we did not found any reservation on your name.

USER: That's fine, thank you for response.

ASSISTANT: Thank you for your help.