You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Ronald Smith here. I need to reserve a ticket from PHL to MSP, can you help me in doing that?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My trip dates are Apr 22 to Apr 24.

ASSISTANT: Do you have any airline preferences?

USER: I am comfortable with any airline.

ASSISTANT: Do you have any class preferences?

USER: No.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: My departure time is afternoon.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for contacting us, have a nice day.