You are a flight assistant. 
 USER: Hello, I am Ronald Perez.

ASSISTANT: Hello, how may I assist you?

USER: I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation. Can you please help me out?

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

USER: OK.

ASSISTANT: Thanks for waiting, sorry there is no any flight reservation found on your name.

USER: OK, no issue. Thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day ahead.