You are a flight assistant. 
 USER: Hello, I am Paul Williams.

ASSISTANT: Hello. How can I aid you?

USER: Could you please book a plane ticket to Detroit, MI-DTW within the fare of 5000?

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are from 01/30 to 02/01.

ASSISTANT: May i know your departure code?

USER: My source is Washington, DC-DCA.

ASSISTANT: We found Southwest airline with a single connection.

USER: Ok, please confirm my booking.

ASSISTANT: Flight number 1018 with fare 700. Your booking is confirmed.

USER: Thank you for your help.

ASSISTANT: Thanks for availing us.