You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

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 am willing to help you. Please help me with your name.

USER: My name is Lisa Green.

ASSISTANT: Ok, please stand by.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry to say no reservation found on your name.

USER: Ok, no issues.

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

USER: Thanks for the help.