You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Gregory Lee here.

ASSISTANT: How can I aid you at this moment?

USER: I need to cancel my reservation because my friends have already booked my ticket in another flight I was not aware of this thing, so can you please help me out with cancelling of my reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment, I will check your reservation status.

USER: Sure, take your time.

ASSISTANT: There is no previous reservation available in your name Gregory Lee.

USER: Oh! I think the ticket was not booked due to server issue. Thank you for the information.

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