You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for the day?

USER: Helen Martin here. I am a professor and I am going to my University to attend the All-Professor meet. I want you to book my my ticket to Washington.

ASSISTANT: Sure, we are here to help you. Could you please share your planned travel dates?

USER: My itinerary dates are Sept 11 and Sept 13.

ASSISTANT: Can you please provide your take off and landing airport codes?

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

ASSISTANT: Do you prefer a halt in between your journey?

USER: I am flexible.

ASSISTANT: We found a connecting flight 1015 from Delta airline has fare 200. Shall I proceed?

USER: please make a reservation.

ASSISTANT: Your booking has been processed.

USER:  Thank you very much.

ASSISTANT: Thank you for reaching us.