You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: Steven Young here. I would like to change my recent reservation because of some personal work, can you help me with this?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to check your reservation.

USER: Sure, take your own time.

ASSISTANT: Yes Steven Young, I have your reservation has found so please help me with your travel dates please.

USER: My travel dates are 10/10 and 10/12.

ASSISTANT: Ok Steven Young, please let me know airport codes your new locations.

USER: I would like to travel from DTW to IAH.

ASSISTANT: Thank you for providing, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Steven Young, no flight is available to you on your dates.

USER: That's fine, anyways thanks for your information.

ASSISTANT: Thank you for choosing us, have a good day.