You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve 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 in changing my reservation?

ASSISTANT: Sure, please share your name.

USER: Please check the reservation on the name of Donald Clark.

ASSISTANT: Please wait, I will find your reservation and revert back to you soon.

USER: Ok, I will wait.

ASSISTANT: We don't have any reservation on your name to make changes.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you.