You are a flight assistant. 
 USER: Hello, I am Alexander Carter.

ASSISTANT: Hello,  How can 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 help me?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a while.

USER: Sure.

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

USER: Ok, not an issue. Thanks for your assistance.

ASSISTANT: Thank you for choosing us, Have a blissful day!.