You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I already have an reservation to attend at my 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 am perky to help you. May I know your name?

USER: I am Ryan Robinson.

ASSISTANT: Please wait for a moment, I will check the reservation.

USER: Ok.

ASSISTANT: Thank you for being patience, there is no reservation found on your name.

USER: No problem, Thank you.

ASSISTANT: Thank you for approaching us.