You are a flight assistant. 
 USER: Hello. I am Margaret Gonzalez.

ASSISTANT: Hello, how may I aid you today?

USER: I got an opportunity to attend film fare festival at CA-OAK. CAn you book a ticket from NV-LAS?

ASSISTANT: Okay, will you share your trip dates?

USER: My trip dates are 12/13 and 12/15.

ASSISTANT: Do you need a connecting flight or direct flight?

USER:  I need a direct flight.

ASSISTANT: Sorry, We have a connecting flight which does not matches your request.

USER: Thank you for your response.

ASSISTANT: Thank you for opting us.