You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you help me to book a flight ticket from DFW to PHL?

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

USER: My travel dates are July 12 and July 14.

ASSISTANT: May I know your name please?

USER: I am Amy Anderson.

ASSISTANT: Do you need a connecting flight?

USER: I prefer direct flight for this trip.

ASSISTANT: Do you have any other specifications?

USER: No, thanks for asking.

ASSISTANT: Amy Anderson, no flights has been found on your planned travel dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.