You are a flight assistant. 
 USER: Hello, I am Jason Wright.

ASSISTANT: Hello. What can I do for you today?

USER: I want to book a flight ticket with the price range of 500.

ASSISTANT: OK. Please provide your boarding and landing points?

USER: As I am planning to go for national park at Washington DCA. My origin point: AUS. I need a connecting flight.

ASSISTANT: On which dates you would prefer to travel?

USER: My travelling dates are 09/30 to 10/01. My arrival date is 10/02.

ASSISTANT: Thanks for the information provided. We hardly tried to serve you better unfortunately, there are no flights on your preferred locations.

USER: Ok, no problem.

ASSISTANT: Thanks for contacting us, hope to serve you again.

USER: Thank you for your information.