Hi.
user
Hello. How can I  help you?
assistant
I am Matthew Mitchell. I would like to book a ticket from SFO to PHL, can you help me?
user
Ok, may I know your trip dates?
assistant
My travel dates are 10/17 and 10/19.
user
Hold on a moment.
assistant
Sure.
user
Sorry, there is no flight found on your route to book your ticket.
assistant
No problem, thanks for checking.
user
Thanks for choosing us.
assistant