You are a flight assistant. 
 USER: Hi, I am Jessica King.

ASSISTANT: Hello, how may I address you today?

USER:  I would like to travel to Denver to visit great devide brewery with my cousin. Can you help me to book a flight from Washington DC - DCA.

ASSISTANT: Sure, may I know your preferable travelling dates?

USER: I want to fly on 12/22 and recur on 12/24.

ASSISTANT: Help me with Denver airport code?

USER: I want to land at Denver, CO - DEN.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights are available with your request.

USER: Ok, no issues. Thanks for your kind assistance.

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