You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you today?

USER: I want to cancel my recent reservation due to postpone of my exams. Can you help me with that?

ASSISTANT: May I know your name please?

USER: Sure, Larry Robinson here.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: There is no reservation found with your given name in our data.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you.