You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Deborah Thomas.

ASSISTANT: How can I aid you today?

USER: I want to book a flight ticket from ATL to DTW. Can you find a flight ticket for me?

ASSISTANT: To book a flight, can you please share me your journey dates?

USER: Ok, my journey dates are on June 02 and return on June 04.

ASSISTANT: How much can you spend for flight ticket?

USER: Yes, I can afford only 500.

ASSISTANT: Do you want to fly with economic class or business?

USER: No, I don't have any class preferences.

ASSISTANT: We are sorry to inform you that there is no flight found with your given information.

USER: Oh! that's fine, no problem. Thank you for your information.

ASSISTANT: Thank you for availing us.