Hi.
user
Hello. How may I assist you today?
assistant
I am Mary Williams. I want to book a ticket from IAD to OAK, can you help me?
user
May I know your travelling dates, please?
assistant
My travel dates are 12/10 and 12/12.
user
Do you need any specifications for this reservation?
assistant
I want to return in the afternoon.
user
Sorry, there are no flights available on your journey dates.
assistant
No problem, thanks for checking.
user
Thank you for opting us, we hope to serve you again with better features.
assistant