You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please book a flight ticket from DFW to PHX?

ASSISTANT: May I know your desired travel dates please?

USER: Sure, I need to travel on dates of Mar 26 and Mar 28.

ASSISTANT: May I know your name please?

USER: Sure, myself Matthew Johnson.

ASSISTANT: Please share your preferred connection limit.

USER: I am looking for single connecting flight.

ASSISTANT: Do you have any specifications?

USER: I would prefer business class to travel.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for opting us.

USER: Most welcome.