You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: I would like to change my reservation on the name of Katherine Edwards, so please help me in changing.

ASSISTANT: Sure, I will help you to change your reservation. Please wait for moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on given name.

USER: No problem, thanks for your quick response.

ASSISTANT: Thank you for reaching us, we hope see you again.