You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Thomas Young.

ASSISTANT: Nice to meet you Young.

USER: I would like to travel from AUS to DTW, could you help me out?

ASSISTANT: Sure, I will definitely help you with flight ticket booking and can you mention that when you have planned your flight journey?

USER: My preferable dates are from 15-17 Mar.

ASSISTANT: Do you need business class or economy class flight for booking?

USER: I prefer Business class.

ASSISTANT: Wait for a moment to search for the flight.

USER: Ok.

ASSISTANT: Thank you for your patience, no airlines is providing a flight to book the ticket on your planned dates.

USER: That's ok. Thank you.

ASSISTANT: You are welcome and thank you for consulting our agency.