You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Carol Harris here.

ASSISTANT: How can I assist you?

USER:  I would like to book a ticket to meet my friend at ATL. Can you please help me out to book a ticket from IAD?

ASSISTANT: Sure, may I know your journey dates please?

USER: Sure, my trip dates are 11/16 and 11/18.

ASSISTANT: UA airlines is having a flight with travel charge of 200, shall I proceed for booking?

USER: Please confirm the ticket.

ASSISTANT: Your ticket has been booked with flight-1021, have a safe journey.

USER: Thank you so much.

ASSISTANT: Thank you for choosing us.