You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Carolyn Rodriguez. I am planning to visit Museum of Nature and Science at Denver, could you please help me with booking a flight ticket?

ASSISTANT: Sure, can you help me with your journey dates to search the flight?

USER: I would like to take off on 06/04 and return on 06/06.

ASSISTANT: May I know your airport codes?

USER: My nearest source airport code is DCA and destination airport code is DEN.

ASSISTANT: There is a flight-1018 of JetBlue airlines, shall I proceed?

USER: May I know the price and connection of the flight?

ASSISTANT: Price is 300 with 1 connection.

USER: Don't book the ticket, my price limit is just 200.

ASSISTANT: Sorry for inconvenience. Thank you for choosing us, have a nice day.

USER: That's ok, thank you for the information.