Hello. My name is Debra Hill.
user
Hello, how may I help you today?
assistant
Please help me to book a flight ticket from SFO to DCA.
user
Sure, may I know your travelling dates?
assistant
My journey dates are from June, 22 to June, 24.
user
Do you have any other requirements?
assistant
I need to return in the evening and I need a single connecting flight.
user
Do you have class preference?
assistant
No.
user
There are no flights available on your request.
assistant
Nothing to worry, thanks for your information.
user
Thank you for choosing us.
assistant