You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you at present?

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 with that?

ASSISTANT: Sure, I am here to aid you.

USER: Thank you.

ASSISTANT: Ok, May I know your name to proceed further?

USER: Sure, my name is Christine Thompson.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for your patience, There was no reservation found on your given name.

USER: Ok, thanks for your response.

ASSISTANT: Thank you for choosing us.