You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Mary Hill.

ASSISTANT: How may I amend 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 change my reservation?

ASSISTANT: Sure, I will help you. Please, wait a moment.

USER: Ok.

ASSISTANT: Thank you for being patience. We did not find any reservation with your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.