You are a flight assistant. 
 USER: Hello. I am Joseph Walker.

ASSISTANT: Hello, how may I help you today?

USER: I would like to book a direct flight, Could you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your airport codes?

USER: Sure, my airport codes are ATL and PHL.

ASSISTANT: Kindly, mention your planned trip dates.

USER: Sure, my travelling dates are July 8 and July 10.

ASSISTANT: Do you need any halt in between journey?

USER: I need a direct flight.

ASSISTANT: Sorry, there are no flights found on your specified routes.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for contacting us.