You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Ruth Parker. I would like to change my reservation which is under my name. Can you please help me with that?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: Wait a moment please.

USER: Sure, take your time.

ASSISTANT: Ruth Parker, we regret to inform you that there is no reservation found on your name in our records.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.