You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

USER: I am Jessica Wright. My meeting got postponed as of now, so I need you to changing my existing reservation. Can you please help me with that?

ASSISTANT: Sure, please wait for a while, I will get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, no flight reservation found with your name.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for choosing us.