You are a flight assistant. 
 USER: Hello.

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

USER: I need a flight ticket to reach Washington, can you please help me to book a flight ticket from EWR to DCA?

ASSISTANT: Sure, I am happy to help you with that.  Can I have your travel  dates please?

USER: Thank you. My travel dates are Aug 28th and Aug 30th.

ASSISTANT: Ok, please let me know the timings of your journey.

USER: I am looking for a flight which is returning in the evening time.

ASSISTANT: Do you prefer any specific class to travel?

USER: No but I prefer a single connecting flight to travel.

ASSISTANT: Do you have any other specifications?

USER: No, thanks for asking.

ASSISTANT: Can I have your good name please?

USER: My name is Samuel Brown.

ASSISTANT: AA airlines running  a direct flight in your route which can offer a ticket with fare 200 in economy class. Shall I proceed with booking?

USER: Yes, you can proceed with the ticket booking process.

ASSISTANT: Ok, your ticket booking has done and the flight number is 1014.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us, have a great journey.

USER: Most welcome.