Hello.
user
Hi,. How can I help you?
assistant
I want to travel from WA-SEA to DC-DCA, could you please help me to book a flight ticket?
user
Sure , please provide me your name & date of travelling .
assistant
I am Kenneth Adams, my travel dates 11/17 and 11/19.
user
Mr  Kenneth Adams I am sorry there is no flights on your dates.
assistant
It's OK, thank you for your wonderful service.
user
Thank you.
assistant