You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,How can I help you?

USER: I want to book a flight ticket to NC - CLT from CA - SFO. Can you help me with this?

ASSISTANT: Sure, Please help me with your travel dates?

USER: I want to fly on 12/06 and arrival on 12/08.

ASSISTANT: Can I get your name?

USER: Sure, myself Patrick Turner.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, thanks for your assistance.

ASSISTANT: Thank you for opting us.