You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Dorothy White, I need a reservation in the month of August. Can you please help me to book a flight ticket from OAK to DFW?

ASSISTANT: Sure, I will help you out in booking the ticket.

USER: Thank you.

ASSISTANT: May I know your travelling dates too?

USER: Sure, my travelling dates are 08/10 and 08/12.

ASSISTANT: Sorry, there are no flights found.

USER: Not a problem, anyway thank you for the information.

ASSISTANT: Thank you for choosing us.