You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Betty Anderson. I want to book a flight ticket from Washington DCA. Can you find a flight ticket for me?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, I am planning to travel on these days that is on June 22 and back on June 24.

ASSISTANT: May I know your destination?

USER: Yes, my destination code is PHX.

ASSISTANT: At what time do you like to leave from DCA?

USER: No, I don't have any time specifications.

ASSISTANT: We found a economy flight on your details with airline Delta, flight number: 1020. Shall I book this ticket?

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

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you.