You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit Washington, DCA. Can you please book me a ticket from Oakland, OAK?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My preferable journey dates are from 06/28 to 06/30.

ASSISTANT: May I know your good name please?

USER: My name is Barber Garcia.

ASSISTANT: There is a direct flight available on your requested dates from Frontier airlines.

USER: Please find 1 connection limit on this route.

ASSISTANT: Sorry, no flight is available for your request.

USER: Ok, not an issue. I will find any alternate for this trip.

ASSISTANT: Thank you.

USER: Thank you for providing information.