You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mary Martin here.

ASSISTANT: Please tell me, how may I help you?

USER: I have a planned a trip to travel America to see the Golden Gate Bridge, but, on an urgent in my office work, I need to cancel the ticket. Can you help me with this?

ASSISTANT: Sure. I will help you.

USER: Ok.

ASSISTANT: Please wait, let me check your details.

USER: Sure, take your own time.

ASSISTANT: No reservation found on your name in my database. Sorry for inconvenience.

USER: Thanks for checking.

ASSISTANT: Thank you for reaching us, have a nice day.