You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Roberts.

ASSISTANT: How can I help you?

USER: I would like to attend a my brother marriage at Charlotte, can you help me to book a flight ticket from OAK to CLT?

ASSISTANT: Sure, I am happy to help you. When are you planning to make your journey?

USER: I am travelling from Mar 09 to Mar 11.

ASSISTANT: Do you prefer any stopover in between journey?

USER: Yes, I need a stopover in between my journey.

ASSISTANT: Are you comfortable with any economy class?

USER: I am comfort with any class.

ASSISTANT: Do you want to travel in normal-cost airline or low-cost airline?

USER: I am comfortable with any airlines.

ASSISTANT: Is there any other specifications to be met?

USER: Please ensure the departing flight in the morning time.

ASSISTANT: Thank you for providing details, no flights are available on your preferable dates of travel.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.