You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Pamela Smith.

ASSISTANT: How can I amend you?

USER: I need to cancel my recent reservation due to postpone of my exam. Could you please help me in doing that?

ASSISTANT: Sure. Please, wait.

USER: Sure.

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

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.