You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Please help me to book a flight ticket from LAX to PHL.

ASSISTANT: Sure, may I know your dates of travel?

USER: I want to take off on Oct, 16 and return back on Oct, 18.

ASSISTANT: Do you have any connection limit for your journey?

USER: I would prefer single connection.

ASSISTANT: May I know your other specifications?

USER: I need to return at evening time.

ASSISTANT: Let me know your good name to proceed further.

USER: Susan Taylor here.

ASSISTANT: Sorry, there are no flights running on your desired dates of travel.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for opting us.