You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ronald Parker.

ASSISTANT: Ronald Parker, how may I assist you today?

USER: I am looking for a flight from ORD to DEN, can you help me?

ASSISTANT: Sure I will help you. Please help me with your planned travel dates.

USER: My travelling dates are 29 and 31 of Aug.

ASSISTANT: Do you need a direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Please let me know with your departure and arrival time.

USER: My class preference is economy and depart time in the afternoon.

ASSISTANT: I am sorry to inform you that there are no active flights available.

USER: It's ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us. Have a great day.