Hello.
user
Hello. How can I assist you today?
assistant
I am having an invitation from White House in Washington, please book me a ticket from SFO to DCA.
user
Sure, could you please provide your preferable travel dates?
assistant
My preferable journey dates are from 07/13 to 07/15.
user
May I know your name to proceed further?
assistant
My name is Katherine Lewis.
user
Katherine, I am sorry to inform you that there is no flight available at your request.
assistant
Ok, no issues. Thank you for your information.
user
You are welcome. Thank you for contacting us.
assistant