You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I serve you today?

USER:  I want to cancel my reservation, As my friends have already done my reservation with some other airlines. Could you please help me out?

ASSISTANT: Sure, let me know your good name please.

USER:  I am Debra Davis.

ASSISTANT: Ok, give me sometime to check and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting. Unfortunately we didn't found any reservation with your name.

USER: Ok, Not a problem. Thanks for the quick service.

ASSISTANT: Thank you for availing with us.