You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Donna Baker.

ASSISTANT: Do you want me to help you with anything?

USER: I want to travel from AZ-PHX to FL-MCO for a business trip.Can you please help me for booking a ticket?

ASSISTANT: May I know your travelling dates?

USER: My departure date is 02/18 and return date is 02/20. Make sure my price limit is 500 and the connections limit is 1.

ASSISTANT: Sorry to say that there is no flight found.

USER: Ok, thank you for the information.

ASSISTANT: Welcome.