You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Eric Green here.

ASSISTANT: Welcome to Global flight booking agency. How may I assist you today?

USER: I have a Seminar in Atlanta.Can you please help me for booking a ticket?

ASSISTANT: Sure, on which dates you have Seminar in Atlanta?

USER: My departure date is 10/08 and return date is 10/10.

ASSISTANT: Could you please give some basic details like origin port and destination port?

USER: My airport codes are from PA-PHL to GA-ATL. Make sure my connections limit is 1.

ASSISTANT: Sorry, I cannot find any flight with 1 connection.

USER: Ok, thank you for the information.

ASSISTANT: It's my pleasure.