You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you the best today?

USER: I am Gregory Parker. I want to book a flight ticket from DC-DCA to CO-DEN. Can you help you?

ASSISTANT: Ok, on which dates you want to book your ticket?

USER: 05/27 and 05/29 are my travelling dates.

ASSISTANT: AA airline is available on your route with fare 100.

USER: You can reserve it.

ASSISTANT: Ok, your booking is reserved.

USER: Thank you for your help.

ASSISTANT: Thanks for approaching us, have a nice day.