Hi.
user
Hello. How can I assist you now?
assistant
I want to fly from LAS to OAK. Can you book a flight from that route?
user
Sure, I am happy to help you with that. Can I have  your travel dates please?
assistant
My planned travel dates are 11/27 and 11/29.
user
Ok, please let me know your  preferable timings of your journey.
assistant
Make sure that, my return time should be in afternoon only.
user
Do you have any other specifications?
assistant
I want a flight with single connection.
user
Can I have your good name please?
assistant
Sure, Deborah Scott here.
user
Sorry to inform you that no flight is available to you on your travelling dates.
assistant
No issues, thank you for the information.
user
Thank you for choosing us, have a good day.
assistant