You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you aid me to book a flight ticket from PHL to MSP?

ASSISTANT: Sure, may I know your travel dates?

USER: My trip dates are Aug 2 and Aug 4 respectively.

ASSISTANT: Is there any specifications?

USER: No specifications for me.

ASSISTANT: May I know your good name?

USER: Alexander Hill here.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Thank you.

ASSISTANT: Thank you for reaching us.