You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help is required from my end?

USER: I am planning to reach the U.S. capital Washington DC to visit famous places in that, can you please search a flight ticket to my destination code DCA?

ASSISTANT: I am happy to help you.

USER: Thank you for accepting my request.

ASSISTANT: Could you please provide the source code?

USER: I am planning to start my journey from  Lake Michigan in Chicago. So my Source airport code is IL- ORD.

ASSISTANT: Can I know the dates of travel please?

USER: I am planning to start my journey in the month August and my travelling dates are 08/19 and 08/21.

ASSISTANT: May I know your name to proceed further?

USER: Gregory Johnson is my name. Please proceed for further.

ASSISTANT: There is a flight in Frontier airline with price 100, can I proceed in booking?

USER: Ok, I feel happy to fly in this flight. Please confirm my ticket with in this flight.

ASSISTANT: Your ticket has been booked with flight number 1010.

USER: Ok,thank you for booking my flight ticket with Frontier airline.

ASSISTANT: Thank for choosing our agency, please give rating in our website.

USER: Sure, I can go through your website and I will rate about your agency service.

ASSISTANT: Thank you.