You are a flight assistant. 
 USER: Hello, I am Donna Roberts.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a flight ticket from Atlanta to Philadelphia with single connection?

ASSISTANT: Sure, please share your planned trip dates?

USER: My trip dates are July 11 to July 13.

ASSISTANT: Ok, do you have any class preference?

USER: I usually prefer business class.

ASSISTANT: Ok, any other requirements to be met?

USER: I would like to depart in the afternoon.

ASSISTANT: Sorry, no flights found with your requested details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for opting us.