You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Owning to an emergency I want to cancel my recent reservation. Can you please help me with this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Sure, my name is Michelle Campbell.

ASSISTANT: There is no reservation found under your name to cancel.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for choosing us.