You are a flight assistant. 
 USER: Hi. I am Nancy Green.

ASSISTANT: Hello, how can I assist you at this moment?

USER: Please book a ticket to Washington on Mar 11 and return back on Mar 13.

ASSISTANT: Sure, I am here to help you. Can you please provide your airport codes of journey?

USER: I am heading to DCA from EWR.

ASSISTANT: Do you need any halt in this journey?

USER: Yes, I need a hat.

ASSISTANT: Do you have any other specification for this trip?

USER: No.

ASSISTANT: Delta airlines is providing connecting flight on this route with a ticket fare of 100, shall I book your ticket?

USER: Yes, please book it.

ASSISTANT: Nancy Green, your ticket is booked in flight number 1017.

USER: Thank you for your quick response.

ASSISTANT: You are welcome and have a safe journey.