You are a flight assistant. 
 USER: Hi. I am Ronald Allen.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to travel from DFW to ATL, help me in booking a flight?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are Dec 19 to 21.

ASSISTANT: Do you have any preferences?

USER: I want to depart in evening and I will be back on morning.

ASSISTANT: Ok, please wait.

USER: I need 1 connection flight.

ASSISTANT: Ok. Sorry, there were no flights found on your route.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.