Hi,.
user
Hello, how can I serve you for the day?
assistant
Please book a ticket from San Francisco, CA-SFO to Washington DC-DCA, for culture, heritage and folk festival. I'm Michelle Nelson.
user
Ok, when do you want start your journey?
assistant
01/19 is depart date and will return by 01/21.
user
Ok, please wait for a while.
assistant
Sure.
user
Sorry, there are no flight found.
assistant
Thanks.
user
Thank you for choosing us.
assistant