You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Barbara baker. I want to book a ticket from EWR to IAD to meet my car dealer for paperwork.

ASSISTANT: Can I know your preferable travel dates?

USER: My departure date is 05/03 and return from Washington on 05/05.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Sure.

ASSISTANT: Barbara, I am sorry to inform you that there is no flight available at your requested dates.

USER: That's ok, I will check for other alternatives. Thank you.

ASSISTANT: You are welcome. Thank you for contacting us.