You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Sure, may I know your travel dates?

USER: My planned travel dates are Sept 11 and Sept 13 respectively.

ASSISTANT: Do you have any connection limit?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: Is there any class preference?

USER: No, other preferences.

ASSISTANT: Any other specifications to be met?

USER: No. Thank you for asking.

ASSISTANT: Can I know your name?

USER: Sure, myself Janet King.

ASSISTANT: Sorry, there were no flights found on your preferred dates.

USER: That's fine, no issue, I will go with other agency. Anyway thank you for checking.

ASSISTANT: Thank you.