You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in booking my ticket from PHL to DFW?

ASSISTANT: May I know your trip dates?

USER: My trip dates are from 09/30 to 10/02.

ASSISTANT: Do you have any connection limits?

USER: I need a single connecting flight.

ASSISTANT: Can you please tell me your name?

USER: Myself Michelle Perez.

ASSISTANT: Sorry Michelle, we regret to inform you that there is no flight available as per your request.

USER: It's ok, thank you.

ASSISTANT: Most welcome.