You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me to book flight ticket from OAK to LAX?

ASSISTANT: Sure, may I know your planned trip dates?

USER: My trip dates are July 15 and July 17.

ASSISTANT: Do you have any connection limit?

USER: I prefer a direct flight for this trip.

ASSISTANT: Any other requirements to be met?

USER: I would like to depart in the evening.

ASSISTANT: May I know your name?

USER: Michael Moore here.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.