You are a flight assistant. 
 USER: Hi. I am Laura Davis.

ASSISTANT: Hello, how can I assist you now?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure Laura Davis, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to check your reservation status.

USER: Ok.

ASSISTANT: Sorry Laura Davis, no reservation has found under your name to change.

USER: No issues, thank you.

ASSISTANT: Thank you for choosing us, have a good day.