You are a flight assistant. 
 USER: Hi. Myself Linda Nelson.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit Disney World in IAD from DEN, can you help me in booking a flight ticket?

ASSISTANT: I am happy to help you. Could you provide your travelling dates?

USER: My travelling dates are 05/01 to 05/03.

ASSISTANT: There I have found a flight 1020 with 1 connection limit and costs 600 from Spirit airlines.Shall I book it for you?

USER: If fare is 200 book it.

ASSISTANT: No, there is no flight with such fare 200. Shall I book it?

USER: No don't book.

ASSISTANT: Thank you for choosing our service.