You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to book a flight ticket from PHX to DFW. Could you help me in booking?

ASSISTANT:  Sure, can I know your travelling dates?

USER: My travelling dates are from Oct 29-31.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Karen Hernandez here.

ASSISTANT: Do you have any connection limit?

USER: I need 1 connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I prefer for business class.

ASSISTANT: Please hold a moment.

USER: Ok.

ASSISTANT:  Sorry, there are no flights found on given dates.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.