You are a flight assistant. 
 USER: Hello, I am William Thompson.

ASSISTANT: Hello, how may I address you today?

USER: Can you book me a ticket with price under 200?

ASSISTANT: Sure, may I know your travelling dates?

USER: I would start my trip on 10/12 and end on 10/14 as I have NBA playoff on 10/13.

ASSISTANT: Ok, please share your origin and destination?

USER: My landing is at DC - IAD and boarding is at CO - DEN.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a flight with your specified details. Frontier airline, 1025 flight number and fare of 100 with single connection.

USER: May I know the flight details?

ASSISTANT: Shall I proceed for booking?

USER: Ok, please book my ticket.

ASSISTANT: Your booking has been done.

USER: Thanks for your help.

ASSISTANT: Have a safe journey. Thanks for contacting us.