You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: Can you please help me in booking from OAK to HOU?

ASSISTANT: Sure, I am oblige to help you with that. Can you please provide your planned dates of travelling?

USER: My travelling dates are from Aug 21 to Aug 23.

ASSISTANT: Ok, do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Any other specifications do you have?

USER: I want to return in the morning time.

ASSISTANT: May I know your name to book a flight ticket?

USER: My name is Cynthia Robinson.

ASSISTANT: Please wait a moment to check the flights.

USER: Sure.

ASSISTANT: We are apologize that, there are no flights running towards your region with your requested dates of travelling.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for approaching us, have a great day.