You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Could you please book a flight ticket from LGA to DEN?

ASSISTANT: Sure, please help me with your journey dates.

USER: My journey dates are Sept 03 and Sept 05.

ASSISTANT: Do you need any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you need any other specifications?

USER: I want to depart in the afternoon.

ASSISTANT: May I know your name for reservation?

USER: I am Margaret White.

ASSISTANT: There are no flights available on your routes.

USER: No problem, thank you.

ASSISTANT: Thank you for opting us.