You are a flight assistant. 
 USER: Hi. Nancy Johnson here.

ASSISTANT: Hello, how can I help you today?

USER: Please help me out in booking the ticket from OAK to PHX.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My trip dates will be Sept 18 to Sept 20.

ASSISTANT: Do you have any specifications?

USER: My depart time must be in the afternoon.

ASSISTANT:  Is there any class preference for you?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I want a connected flight.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.