You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Please help me to book a flight ticket from PHL to MSP.

ASSISTANT: Sure, I am here to help you. May I know your travelling dates?

USER: My trip dates are 22 to 24 of Dec.

ASSISTANT: Do you prefer any break in between journey?

USER: I need a direct flight.

ASSISTANT: Are there any other specifications for you?

USER: No.

ASSISTANT: Can I have your good name?

USER: I am Stephanie Mitchell.

ASSISTANT: Sorry, no flights are available on your journey routes.

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

ASSISTANT: Thank you for contacting us.