You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you today?

USER: Betty Lee here. I want to book a ticket from PHL to MSP, can you help me in reserving a ticket?

ASSISTANT: Sure Betty Lee, I am here to help you with this. Can you please mention your planned journey dates?

USER: My travelling dates are 04/19 to 04/21.

ASSISTANT: Do need a halt in between your journey?

USER: I need a connecting flight.

ASSISTANT: Do you have any class preferences?

USER: I am comfortable with any class.

ASSISTANT: There are no fights available as per your travel dates.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing our agency, have a nice day.

USER: Thank you for the information.