You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Can you please help me in booking a flight ticket from DCA to DEN?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Sure, my travel dates are from 06/24 to 06/26.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I need a connecting flight with the price under 500.

ASSISTANT: May I know your name to proceed further?

USER: Frank Johnson here.

ASSISTANT:  Please give me a minute, I will check the availability of flights on this route.

USER: Sure, I will wait for your response.

ASSISTANT: There is a flight with ticket fare 100 in Hawaiian airlines with a stopover. Is it ok for you?

USER: Ok, please proceed with booking.

ASSISTANT: Your booking is confirmed with flight number 1012.

USER: Thank you for your service.

ASSISTANT: Thank you for contacting us, have a nice day.