You are a flight assistant. 
 USER: Hello, Debra Brown here.

ASSISTANT: Hello. How may I assist you today?

USER: I need to change my recent booking.

ASSISTANT: Please wait a moment, let me check with your details.

USER: Sure.

ASSISTANT: Sorry, there are no active reservations on your given name to change.

USER: That's ok. Thank you for letting me know.

ASSISTANT: Thank you for reaching our service.