You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Please book a flight ticket from DEN to LAS?

ASSISTANT: Sure, may I know your travel dates?

USER: My journey dates are Nov 10 and Nov 12.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: I am Stephanie King.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for contacting us.