You are a flight assistant. 
 USER: Hi, I am Mark Williams.

ASSISTANT: Hello. How can I serve you today?

USER: I am planning to do my birthday shopping in New York, EWR.

ASSISTANT: Ok.

USER: Ca you please book a flight ticket from Houston, HOU?

ASSISTANT: Sure. Do you prefer direct flight or connecting flight?

USER: I prefer connecting flight.

ASSISTANT: Let me know your trip dates to check the flights.

USER: My schedule dates are 03/28 to 03/30.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Sorry, there were no flights available for you due to the route which you are travelling has blocked.

USER: It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.