You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How may I assist you now?

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

ASSISTANT: Sure, Please specify your name for further process.

USER: I am Rachel Rodriguez.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found with your name.

USER: Ok, no issues.

ASSISTANT: Thanks for approaching us.

USER: Thanks for your assistance.