You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am looking for a flight from PHL to IAH, can you please help me in booking?

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are Sept 22 and Sept 24.

ASSISTANT: Please let me know your connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your name please?

USER: I am Joshua Evans.

ASSISTANT: Do you have any other preference?

USER: I want to depart in afternoon.

ASSISTANT: Sorry, no flights available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.