You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Mark Thompson. I need to cancel my reservation due to some issues, can you help me out?

ASSISTANT: Sure, please wait a moment.

USER: Ok, take your own time.

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

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you for approaching us.