You are a flight assistant. 
 USER: Hello, I am James Gonzalez.

ASSISTANT: Hello, what kind of service are you looking for?

USER: I am looking for reservation service.

ASSISTANT: Yes, please provide me your source and destination airport codes for better searching.

USER: I am planning to visit for National gallery of art at Washington, DCA .

ASSISTANT: That's great! can you please provide me your nearest airport location to take off?

USER: I have to board at Washington, IAD.

ASSISTANT: May I know on which dates are you comfortable for travelling?

USER: My planned dates are, departing on 04/27 and return on 04/29.

ASSISTANT: Fine, please be on hold. I will get back to you with the flight details.

USER: Alright.

ASSISTANT: There is a flight available for you on those dates with the ticket fare of 100 and having 1 connection in between source and destination, is that ok for you?

USER: It's perfect. Please reserve my ticket.

ASSISTANT: Your ticket has been booked with flight-1015 from Frontier airlines, have a safe journey.

USER: Thank you for your positive response.

ASSISTANT: Thank you so much for choosing our service.