You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need to cancel my reservation, as my friends have already booked my ticket in another flight along with theirs, I was not aware of this thing, can you please cancel the ticket for me?

ASSISTANT: Sure, can I know your name for cancelling reservation?

USER: The reservation has done on Debra Robinson name.

ASSISTANT: Sorry, there is no reservation available in my database regarding your name.

USER: That's alright, thanks for searching and quick help.

ASSISTANT: You are welcome. Thank you for choosing us.

USER: Welcome.