You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: My name is Barbara Clark and I would like to book a ticket from PHX to ORD where I have a party to attend.

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My planned journey dates are as follows Mar 13 and Mar 15.

ASSISTANT: Ok, do you have any specifications?

USER: Yes, I would like to travel single connection flight.

ASSISTANT: May I know your name please?

USER: Barbara Clark.

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

USER: No issue, thank you for your time and information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.