You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I support you today?

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 with it?

ASSISTANT: Sure, I will help you with this. Could you please provide your name to check your previous reservation status?

USER: My name is Margaret Hernandez.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: OK, no issues.

ASSISTANT: Thanks for opting us.

USER: Thanks for the help.