You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am John Robinson.

ASSISTANT: In what way can I aid you at this moment?

USER:  I already made a 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 in doing that?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Give a minute, I will check and let you know the status.

USER: Sure.

ASSISTANT: Thanks for being patience.

USER: Ok.

ASSISTANT: Sorry, I did not get any reservation on your name.

USER: Not an issue.

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

USER: Thank you for the information.