You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,how can I oblige you today?

USER: Can you please book a flight ticket from OAK to HOU?

ASSISTANT: Can I know your trip dates?

USER: My trip dates are Sept 27 and Sept 29.

ASSISTANT: Do you need a connecting flight?

USER: I need a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Can I know your good name?

USER: My name is Dorothy Wilson.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you.