You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Due to sudden work at my office, I want to cancel my recent reservation.

ASSISTANT: Sure, may I know your name?

USER: I am Elizabeth Smith.

ASSISTANT: Ok, please wait for sometime.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you for reaching us.