You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I just want to cancel my recent reservation due to sudden dismissal of my great grand mother.

ASSISTANT: Sure, may I know your name?

USER: I am Dorothy Thompson.

ASSISTANT: Sure, please wit a moment I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: Ok, thanks for your information.

ASSISTANT: Thanks for reaching us, have a good day.