You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you for today?

USER: Can you please help me to cancel my reservation?

ASSISTANT: I am here to help you about that, can you please let me know your name to check the reservation status?

USER: Thank you for accepting the request, I am Debra Lewis.

ASSISTANT: Please wait for some time to check your booking.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found for the user name in our data base.

USER: It's ok, not a problem. Thank you.

ASSISTANT: You are most welcome and thank you for reaching us.