You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of assistance you are looking from our side?

USER: I would like to change my recent reservation due to some personal issues, will you help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you for accepting my request.

ASSISTANT: May I know on which name the ticket was reserved?

USER: Myself Eric Green.

ASSISTANT: Ok, please be on hold.

USER: Ok, I will wait.

ASSISTANT: We found a reservation on your name, can you please forward your new journey dates?

USER: My travelling dates are Aug 11 and Aug 13.

ASSISTANT: Kindly assign your airport codes?

USER: My airport codes are ATL and PHL.

ASSISTANT: Is there any class preference?

USER: I need a direct flight in business class.

ASSISTANT: Do you have any other preferences?

USER: No, thank you for asking.

ASSISTANT: Ok, please be on hold for some time.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry, there are no flights are available matching your essentials.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for approaching us.