You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: My good name is Cynthia Carter. Would you please make a reservation to Seattle to visit a Woodland park zoo?

ASSISTANT: Sure, can I know your planned dates to book a flight?

USER: My trip dates are 12/10 and 12/12.

ASSISTANT: May I know your location codes?

USER: My location codes are HOU and SEA. I need a direct flight.

ASSISTANT: Please wait for a moment, I will check and let you know.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, there are no flights found with your preferred dates.

USER: Not a problem.

ASSISTANT: Thank you for choosing our service.

USER: Thank you for giving information.