You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking my ticket from DCA to DEN?

ASSISTANT: Sure, may I know your trip dates?

USER: Sure, my trip dates are from 06/25 to 06/27.

ASSISTANT: Do you have any other requirements?

USER: I need a single connecting flight.

ASSISTANT: May I know your name please?

USER: My name is George Davis.

ASSISTANT: Sorry George Davis, there is no active reservation found under your name.

USER: It's ok, thank you for your help.

ASSISTANT: Most welcome.