You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to book a flight ticket from AUS to ORD. Could you help me in booking?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My travelling dates are from Jan 28 - 30.

ASSISTANT: May I know your name to proceed further?

USER: Myself Samuel Wilson.

ASSISTANT: Sorry Samuel Wilson, there is no flight as per your request.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey.

ASSISTANT: Thank you for reaching us.