You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be your helping hand?

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.

ASSISTANT: Ok.

USER: Can you help me in doing that?

ASSISTANT: Sure, I am perky to help you.

USER: Ok.

ASSISTANT: May I know your name to check reservation?

USER: My name is Melissa King.

ASSISTANT: Please, wait for a while.

USER: Sure.

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

USER: Ok, not a problem. Thank you for informing us.

ASSISTANT: Thank you for approaching us.