You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My friend birthday party place has been changed to Orlando, Can you please change my existing reservation?

ASSISTANT: Sure, we are here to assist you. On whose name, the reservation has been made earlier?

USER: Please check the reservation on the name of Gary Johnson.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, there is no active reservation found in your name to change.

USER: Ok, Thank you.

ASSISTANT: Thank you for choosing us.