You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I will help you. Can I have your planned travel dates please?

USER: I want to travel on 08/20, and return on 08/22.

ASSISTANT: May I know your name please?

USER: I am Michael Allen.

ASSISTANT: Do you need a connecting flight?

USER: I need a break in my journey.

ASSISTANT: Can I have your class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Michael Allen, no flights has been found on your planned travel dates.

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

ASSISTANT: Thank you for choosing us.