You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Brenda Wright here.

ASSISTANT: How can I assist you?

USER: I am a chemistry professor, I have to deliver a guest lecture at Atlanta university. Could you book my ticket from Washington DC?

ASSISTANT: Ok, may I know your travelling dates?

USER: My itinerary dates are 07/19 and 07/21.

ASSISTANT: Can you please share your travelling airport codes?

USER: My genesis and terminus airport codes are DCA and ATL.

ASSISTANT: Here is a flight ticket with fare 100 and 1010 as flight number with single connection flight. Shall I proceed for booking?

USER: Please book my ticket.

ASSISTANT: Ok, your ticket is confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.