Hello,.
user
Hello, how can I help you today?
assistant
I am doctor Sharon Martin, I have an emergency case in Philadelphia, will you please help me for booking a flight ticket?
user
Sure, please provide your source and destination with codes.
assistant
Fine, my source is from NV - LAS  and destination is to PA - PHL.
user
Can I know your depart and return dates?
assistant
My boarding date on 07/26 and return date on 07/28.
user
Please wait a moment. I will check the availability.
assistant
Alright.
user
Thanks for your patience. unfortunately, there are no flights.
assistant
OK, no problem. Thanks for your service.
user
Thank you for choosing us.
assistant