You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Angela Clark.

ASSISTANT: How can I aid you today?

USER: I would like to book a ticket from DCA to DFW, can you please help me out?

ASSISTANT: Sure, I am here to help you. Could you please share your travelling dates?

USER: I am travelling on these dates 07/17 and 07/19.

ASSISTANT: May I know your price limit?

USER: Price limit is 200.

ASSISTANT: We found a direct flight with fare of 100 and flight number 1000 in Delta airline. Shall I proceed with booking?

USER: I need a single connected flight.

ASSISTANT: Sorry, we didn't find any connecting flights. Do I proceed with direct flight?

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for approaching us, have a nice day.