You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Please share your journey dates?

USER: My travelling dates are Aug 18 to Aug 20.

ASSISTANT: Do you have any specifications?

USER: I want to return in the evening.

ASSISTANT: Is there any connection limit?

USER: I need a single connection of flight.

ASSISTANT: May I know your good name?

USER: Sharon Robinson here.

ASSISTANT: Sorry, no flights found on your given details.

USER: Ok, no problem, thanks for your information.

ASSISTANT: Thank you for choosing us.