You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Dennis Garcia. I want to take my children to DFW, can you please help me to book a flight ticket from ATL?

ASSISTANT: Sure, can you please share your travel dates?

USER: Sure, my trip dates are Apr 21 and Apr 23.

ASSISTANT: Do you have any class preference?

USER: I am comfortable to travel in any class.

ASSISTANT: Dennis Garcia, there is a flight available with price 100 and the connection is 1 with Delta airline. Would you like me to proceed with the booking?

USER: My departing time is afternoon.

ASSISTANT: I am sorry to inform you that there is no flight available during afternoon time.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome. Thank you for reaching us.