Hi, I am Frank Hall.
user
Hello, How can I help you?
assistant
I want visit Washington DC - DCA on my holiday. Can you book me a ticket from Las Vegas, NV - LAS?
user
May I know your departure date and return date?
assistant
Yes my departure is on Aug 18 and return is on Aug 20.
user
Please wait a moment.
assistant
Sure.
user
Based on your given information there is a  flight found. Flight number:1007 airline :Southwest with price limit 100 and one connection. Shall I proceed for the booking? Your reservation has been done.
assistant
Thank you.
user
Thank you.
assistant