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