Hello.
user
Hello, how may I assist you today?
assistant
I want to attend a Marriage in LAS. Can you please help me for booking the flight ticket from OAK?
user
Sure, can I know your good name please?
assistant
My name is Susan Thompson.
user
 When you are willing to travel?
assistant
My travelling dates are Apr 22 and Apr 24.
user
 Would you let us know if you have any other preferences?
assistant
I want to depart in evening.
user
Sorry to say that, there are no flights available on the routes of your journey.
assistant
Anyway, thanks for the information.
user
Thank you for opting us.
assistant