You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am Patrick Turner.

ASSISTANT: How may I oblige you today?

USER: I want to cancel my recent reservation due to postpone of my exams. Can you please aid me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name in our database.

USER: Not an issue, thank you.

ASSISTANT: Thank you for reaching us.