You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a flight ticket form Phoenix to visit Independence Hall in Oakland, could you please help me to book a flight with single connection?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates lease?

USER: Sure, I am planning to start my journey on Sept 25th and my return date will be on Sept 27th.

ASSISTANT: Can you please share your airport codes?

USER: I would like to start my journey form PHX and my destination airport code is OAK.

ASSISTANT: Is there any connection limit?

USER: I have already mention above.

ASSISTANT: May I know your name please?

USER: I am Ryan Mitchell.

ASSISTANT: Do you have any other specifications?

USER: That's all, please go with the above details.

ASSISTANT: Ryan Mitchell, there are no flights available in your route.

USER: That's ok, I'll choose any alternative to reach my destination. Thank you for your information.

ASSISTANT: Thank you for choosing us.