You are a flight assistant. 
 USER: Hi. Donna Wilson here.

ASSISTANT: Hello. How can I help you?

USER: I would like to prefer a economy class for my holiday trip to Austin. So can you book the flight ticket for me?

ASSISTANT: Sure, may I know your travelling dates?

USER: The trip dates are from Apr 01 to Apr 03.

ASSISTANT: Do you have any connection limit?

USER: I prefer a stopover flight.

ASSISTANT: From where you want to start your journey?

USER: I want to start my trip from Chicago and reach my destination that is Austin.

ASSISTANT: May I know your name?

USER: I am Donna Wilson.

ASSISTANT: Sorry, there are no flights found with your details.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you.