You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my recent reservation due to sudden postpone of my exams.

ASSISTANT: Ok.

USER: Can you please help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your good name to check for the previous reservation?

USER: I am Timothy Gonzalez.

ASSISTANT: Please, standby.

USER: Sure.

ASSISTANT: Thanks for waiting. I am sorry to inform you that, there is  no reservation found on your name to proceed for cancellation.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for approaching us.