You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I want to book a flight ticket from ATL to PHL. Can you help me in that?

ASSISTANT: Sure, may I know your travel dates?

USER: My trip dates are Apr 06 to Apr 08.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your airline preference?

USER: I don't have any airline preference.

ASSISTANT: Do you have any other requirements?

USER: My return should be in the evening.

ASSISTANT: May I know your name please?

USER: Myself William Hernandez.

ASSISTANT: Sorry, there are no flights in this route as per your travel dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.