Hello.
user
Hello, how may I help you?
assistant
I am Sarah Thomas. I need a direct flight which is travelling from HOU to DCA. Please help me in booking my ticket.
user
Sure, may I know your trip dates please?
assistant
Sure, my trip dates are from 01/11 to 01/13.
user
I am really sorry but on these dates, no flights are available.
assistant
It's ok, thank you for your help.
user
Most welcome.
assistant