You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

USER: I would like to attend a party at Phoenix from DFW. Can you help me book a connecting flight on 01/31?

ASSISTANT: Sure, do you have any price limit?

USER: It need to be within 500.

ASSISTANT: Please let me know your source code.

USER: I would like to reach PHX.

ASSISTANT: When do you want to return?

USER: It need to be on 02/02.

ASSISTANT: Do you have any connection limit?

USER: I prefer one connection.

ASSISTANT: Thanks for providing information, unfortunately there are no flights found with your requested details. May I know your name please?

USER: I am Kenneth Turner.

ASSISTANT: thanks for choosing us, have a nice day.

USER: Thank you for your help.