You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I would like to celebrate this New Year with my friends at Chicago. Can you help me in booking a ticket from DEN to ORD?

ASSISTANT: Sure, when would you like to plan your journey?

USER: My preferred trip dates are 01/01 and 01/03.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: May I know your name please?

USER: My name is Joseph Lopez.

ASSISTANT: Joseph, no flights has been found on your journey dates.

USER: It's ok, I will cancel my trip for this time. Anyways, thank you for the information.

ASSISTANT: Thank you for approaching us.