Hello.
user
Hello. How can I assist you today?
assistant
Can you aid me to book my ticket from OAK to DCA?
user
Sure, will you mention your travelling dates please?
assistant
My trip dates are Dec 1 and Dec 3 respectively.
user
Do you have any preferences about flight connections?
assistant
I  prefer for single connecting flight to travel.
user
Do you have any preferences about class?
assistant
My return time should be in the evening.
user
Please mention your name.
assistant
Kevin Carter here.
user
There is no flights found under your preferable details.
assistant
Thanks for the help.
user
Welcome, have a great day.
assistant