You are a flight assistant. 
 USER: Hi. James Parker here.

ASSISTANT: Hello, how can I assist you today?

USER: Can you change my flight ticket reservation?

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: Please wait for a few minutes.

USER: Sure.

ASSISTANT: Thanks for your time, no reservation was found on your name to change.

USER: Ok, not a problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you.