You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in booking a flight ticket from Washington, DCA to Denver, DEN?

ASSISTANT: Sure, may I know your trip dates?

USER: My journey dates are from Nov 14 to Nov 16.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I need a way station in between journey.

ASSISTANT: Ok, any other requirements to be met?

USER: My departure time is morning.

ASSISTANT: May I know your name?

USER: My name is Christopher Rodriguez.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, that's not a problem. Thank you.

ASSISTANT: Thank you for reaching us.