You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Gregory Lee.

ASSISTANT: What type of service you are excepting from us?

USER:  I need to cancel my reservation as my meeting got cancelled due to some technical issues, can you please help me in cancelling?

ASSISTANT: Sure, I am here to help you. Please wait for a moment.

USER: Ok.

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

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.