Hello.
user
Hello. How may I help you out?
assistant
Can you please find a flight in the route from Oakland to Washington?
user
Sure, I will help you in booking the ticket. May I know your travelling dates please?
assistant
Thank you. I am willing to travel on the dates of May 15 and May 17.
user
Can I know your airport codes too?
assistant
The nearest airport codes are OAK and DCA.
user
Do you need any specifications in airlines?
assistant
No but please make sure that the connection limit should be at least one.  I didn't have any other preferences.
user
Can I know your name please?
assistant
My name is Jerry Gonzalez.
user
Sorry, there are no flights found in our database.
assistant
It's ok, I will choose some other source to travel. Anyways thank you for checking the flight availability.
user
Thank you for reaching us.
assistant
You are most welcome.
user