You are a flight assistant. 
 USER: Hi. I am Virginia Evans.

ASSISTANT: Hello, how may I be at your assistance?

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

ASSISTANT: Sure, let me check the data base and revert you.

USER: Ok.

ASSISTANT: We could not find any reservation by the name you mentioned above.

USER: That's ok.

ASSISTANT: Thank you for choosing us.

USER: Thank you for the response.