You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I'm planning to visit Denver botanical gardens, can you please book the ticket from SEA to DEN?

ASSISTANT: May I know your trip dates?

USER: I would like to depart from my source location on 27th Dec and I want to return back by 29th Dec.

ASSISTANT: Do you prefer any specifications?

USER: I prefer single connected flight.

ASSISTANT: Please share your name.

USER: My name is Ruth Phillips.

ASSISTANT: UA airlines providing a connected flight in economy class.

USER: That's fine for me, you can proceed for booking the ticket.

ASSISTANT: Your booking is done.

USER: Thank you so much for your help.

ASSISTANT: Thank you.