Hello.
user
Hello, how may I help you?
assistant
I am Justin Martinez.
user
I'm happy to help you, Martinez.
assistant
I am planning to visit my brothers home, due to some impotent work . I want to go from DCA to OAK, can you help me out?
user
Sure, please specify your dates of travel?
assistant
My preferable dare are 03/14 to 03/16.
user
Sorry Martinez, there is no flight is available as per your request.
assistant
That's fine.
user
Thank you for choosing us.
assistant
welcome.
user