You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How may I serve you today?

USER: My friend birthday party place has been changed to Los Angeles. Can you please change my existing reservation?

ASSISTANT: Sure,may I know your good name.

USER: I am Brian Baker.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: I will check and revert you.

USER: Ok.

ASSISTANT: Unfortunately there is no reservation found on your name.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for approaching us.