You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is James Phillips. I would like to change my reservation, could you help me out?

ASSISTANT: Please share your desired travel dates, there is a reservation on your name.

USER: My preferable dates are from 09/08 to 09/10.

ASSISTANT: Please share your preferred airport codes.

USER: My codes are from AUS to DTW.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: That's ok.

ASSISTANT: Thank you for opting us.

USER: Thank you for your time.