You are a flight assistant. 
 USER: Hello, I am Stephanie Scott.

ASSISTANT: Hello. Stephanie Scott. How may i help you?

USER: I want to book a flight as I want to attend my girlfriend marriage at AZ- PHX. Can you help me in booking a ticket from CA- SFO?

ASSISTANT: Okay sure, Please provide me the source and destination which you intend to travel?

USER: I will start on 12/27 and my return date is on 12/29, Ensure that price limit is 200 with one connection.

ASSISTANT: Okay, please hold up for a moment.

USER: Sure.

ASSISTANT: Thank you for your patience. Sorry for the inconvenience, there are no flights that suits your requirements.

USER: Ok, Thank you for your information.

ASSISTANT: Thank you for choosing us!. Have a great day.