You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what help do you need from us?

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

ASSISTANT: Sure, I can help you. May I know your name for searching?

USER: Myself Melissa Scott.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Scott, there is no reservation found on your name while I search in our data base.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for approaching us, have a great day. Welcome.