You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Ronald Davis. I want to visit Seattle Centre for refreshment, book a ticket from DCA to IAD.

ASSISTANT: Ok, may I know your travel dates please?

USER: My journey dates are from 06/22 to 06/24.

ASSISTANT: Ok, please wait a while. Let me check and revert you.

USER: Ok.

ASSISTANT: Thanks for waiting. There is a Frontier airline matching your request with flight number 1023 and price of 200.

USER: Book the ticket.

ASSISTANT: Ok, your booking is confirmed.

USER: Thank you for my helping hand.

ASSISTANT: Thank you for choosing us.