You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you now?

USER: I am Justin Lewis. Can you change my existing reservation to new locations?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to check your reservation status.

USER: Sure, take your time.

ASSISTANT: Sorry Justin Lewis, no reservation has found under your name to change.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for choosing us.