Hello.
user
Hello, how can I assist you now?
assistant
I have planned to change my reservation due to sudden change in my trip, can you aid me?
user
Sure, can I have your  good name please to check your  reservation status?
assistant
Patricia Wilson.
user
Ok, please wait a  moment.
assistant
Sure.
user
Yes Patricia Wilson, your  reservation has found so  please let me know your planned dates.
assistant
My preferred dates are May 25th and May 27th.
user
Ok,  please provide me the airport codes of your locations.
assistant
I need to visit ORD from LAS.
user
Do you have any preferences?
assistant
I need single connection between my trip.
user
Sorry to inform you that no flight is available to you on your planned dates.
assistant
No problem, thank you for searching.
user
Thank you for choosing us.
assistant