You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Myself Lisa Perez. I would like to change my reservation which was done earlier, will you help me with that?

ASSISTANT: Sure Lisa Perez, I will help you with that.

USER: Thank you.

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

USER: Sure, take your own time.

ASSISTANT: Sorry Lisa Perez, no reservation has found under your name to change.

USER: Ok, not an issue.

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

USER: Thank you for your information.

ASSISTANT: Most welcome.