You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I useful to you?

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

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can I have your name please to check your details in our database?

USER: I am Benjamin Baker.

ASSISTANT: Ok, let me check your details and I will revert to you with the current status.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Ok, no issues. Thank you for aiding me.

ASSISTANT: Thank you for reaching us.