You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Ryan Rodriguez. Can you help me to book a connecting flight from IAH to LAS?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are 06 and 08 of Mar.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: May I know your class preferences?

USER: No.

ASSISTANT: Do you have any specifications?

USER: I prefer to return in the afternoon.

ASSISTANT: Sorry, there are no flights found on your route.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for reaching us.