You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I give assistance to you?

USER: Can you please change my existing reservation to Chicago?

ASSISTANT: Sure, kindly please share your name.

USER: Sure, I am Christine Clark.

ASSISTANT: Ok, Please wait for a couple of minutes.

USER: Ok.

ASSISTANT: Thanks for waiting, there was no reservation found on your name to change it.

USER: Ok, Thank you.

ASSISTANT: Thank you for reaching us.