You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Karen Baker want to visit Boston, can you book a ticket on 11/15 and 11/17?

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

USER: Sure, I want to fly from DCA to BOS.

ASSISTANT: There is a flight-1023 is available for you, shall I proceed?

USER: Yes, proceed with my booking.

ASSISTANT: Ok, your booking is done.

USER: Thank you.

ASSISTANT: Welcome.