You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Anna Martinez want to visit JFK, can you book a ticket from DCA?

ASSISTANT: Sure, may I know your journey dates?

USER: Sure, my travelling dates will be 12/07 and 12/09.

ASSISTANT: Do you need any specifications in between your journey?

USER: Yes, my flight price should be within the price of 500.

ASSISTANT: There is a connecting flight with number 1019 in airline Frontier, the fare is 100.

USER: Ok, proceed with my booking.

ASSISTANT: Your ticket is reserved, happy journey.

USER: Thank you.

ASSISTANT: Thank you for opting us.