You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you help me in booking a flight ticket from DFW to PHX?

ASSISTANT: When would you like me to book a ticket?

USER: I want to travel on 02/29, and return on 03/02.

ASSISTANT: Do you prefer any lay by in between journey?

USER: I need a lay by in between my journey.

ASSISTANT: May I know your name?

USER: I am Donald Wilson.

ASSISTANT: Is there any other specifications for your journey?

USER: I prefer for business class.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry Donald Wilson, we haven't found any flights based on your specifications.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thanks for reaching us.