You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Will you please book me a plane ticket from PHL to MSP?

ASSISTANT: Sure, can you please share your journey dates?

USER: I will start on July 13th and return on July 15th.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: May I know your name please?

USER: I am Betty Lewis.

ASSISTANT: Are there any more specifications?

USER: No.

ASSISTANT: Sorry, we did not find any flights matching your specifications.

USER: That's alright, thanks for checking.

ASSISTANT: Thank you for choosing us.