You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I am Gregory King. As I am a singer, I want to attend Music Festival in Oakland, CA - OAK. Can you assist me for booking from Washington, DC - DCA?

ASSISTANT: Sure. May I know your price limit?

USER: It should be under 200.

ASSISTANT: I need your travelling dates for further process.

USER: My travelling dates are on 01/27 to 01/29.

ASSISTANT: There is a flight 1028 in Frontier airline and price 100 with a connection. Shall I proceed?

USER: Ok, you can proceed for booking.

ASSISTANT: Ok, Your ticket has been reserved.

USER: Thanks for booking.

ASSISTANT: Thanks for choosing us.