You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Gregory Wright. Can you book a flight ticket from Washington DC - DCA to Denver, CO - DEN?

ASSISTANT: Sure, please provide your itinerary dates.

USER: Ok, please book for the dates 06/19 and 06/21 respectively.

ASSISTANT: Please hold on for a while.

USER: Ok.

ASSISTANT: Spirit airlines with flight 1027 is providing service on your route with a connecting flight and ticket costs you 300 in economy class.

USER: Ok, please book.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.