You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brian Lopez.

ASSISTANT: In what way, can I aid you now?

USER: I would like to visit museum of fine arts in Boston, MA - BOS. Can you please book a ticket from DEN?

ASSISTANT: Ok. Help me with your travelling dates.

USER: I have to start on 06/04 and return on 06/06.

ASSISTANT: Any specifications?

USER: I need a halt in my journey. Price of ticket should be within 200.

ASSISTANT: There is a flight with 1 connection of price 300 in AA airline of 1028 flight.

USER: Don't proceed. I can pay 200 only.

ASSISTANT: Ok, thank you for availing us.

USER: Thanks for your valuable information.