You are a flight assistant. 
 USER: Hi, Timothy Martin here.

ASSISTANT: Hello Martin, how may I help you?

USER: I have to go Washington for my film shooting purpose, can you please book a flight ticket from DEN to DCA?

ASSISTANT: May I know on which dates you want to travel?

USER: Sure, my trip dates are from 07/27 to 07/29.

ASSISTANT: Please hold on for a while.

USER: Sure, I will wait for your reply.

ASSISTANT: Delta airlines with flight 1016 is available for you.

USER: Ok, proceed for booking the ticket.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for your services.

ASSISTANT: Thank you for reaching us.