You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me to book a flight ticket from DCA to IAD?

ASSISTANT: Please provide your travelling dates?

USER: My journey dates are Dec 7 to Dec 9.

ASSISTANT: Do you prefer connecting flight?

USER: I need a single connection of flight.

ASSISTANT: May I know your name?

USER: Gregory Robinson here.

ASSISTANT: Found ticket with Delta airlines for price 100 having flight number 1019. Shall I book a ticket?

USER: Ok, please proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you.