You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

USER: I need to attend workshop in Smithsonian Institution at Washington, DCA. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, may I know your boarding point?

USER: My boarding is from Phoenix, PHX.

ASSISTANT: Could you please share your journey dates?

USER: I would like to travel on 04/22 and intend to return on 04/24.

ASSISTANT: Do you want connecting flight?

USER: No, I need a direct fligth.

ASSISTANT: May I know your name please?

USER: My name is Lisa Gonzalez.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: We found a Delta airline, flight number: 1026, price: 300, it is a direct flight.

USER: Ok, you can proceed with the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for the help.

ASSISTANT: Thank you.