You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Pamela Johnson.

ASSISTANT: How may I assist you?

USER: Can you help me to book a flight ticket from OAK to CLT?

ASSISTANT: Sure, I will help you. Please provide your planned travel dates.

USER: My preferable journey dates are Aug 10 and Aug 12.

ASSISTANT: Do you have any connection preference?

USER: No.

ASSISTANT: May I know your departure and return timings?

USER: I would like to return back in the morning time.

ASSISTANT: Do you have any other specifications?

USER: No, thanks for asking.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Pamela Johnson, no flights has been found on your planned travel dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.