Hi.
user
Hello, how may I assist you today?
assistant
I am Laura Young. Please book a flight ticket from LAS to OAK.
user
Sure, may I know your trip dates?
assistant
My travelling dates are from Apr 27 to Apr 29.
user
Do you have any requirements?
assistant
I want to depart in the evening time.
user
May I know you class preference?
assistant
I have no specified class preference.
user
There are no flights available on your requirements.
assistant
Ok, No issues. Thank you.
user
Thank you for reaching us.
assistant