Hello. I am John White.
Hello. How may I help you out?
I would like to book a ticket from DCA to LGA, can you please help me out?
Sure, I will help you in  booking the ticket, May I know your travelling dates please?
I am travelling on these dates 06/29 and 07/01. Make sure my connection limit is 0.
Sorry, there are no flights found in our database.
Ok no problem, thank you for your services.
Thank you for choosing us.