Hello.
user
Hello! tell me how may I assist you?
assistant
My name is Sandra Taylor,want to book a ticket.
user
OK,Sure! can you please tell me your journey codes & dates of your  travelling?
assistant
Sure, I want to travel from DFW to DFW. My preferable dates are 12/10 to 12/12.
user
May I know  your connections limit & price of your ticket?
assistant
Sure,there should be 1 connection with the price 200.
user
Sorry,Sandra no flights found on your requirements. Thank you.
assistant
Oh! it's OK.
user