You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Can you help me to book a flight ticket from CA - SFO to NC - CLT?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Ok, please book on the dates 06/01 and 06/03.

ASSISTANT: Ok, may I know your name please?

USER: Yes, my name is Kenneth Martinez.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, thank you for providing the information.

ASSISTANT: You are welcome, have a great day.