You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am planning to visit New York, can you please book me a flight ticket from IAH to EWR?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My preferable journey dates are Apr 16 and Apr 18.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I am looking for a connecting flight for this trip.

ASSISTANT: Do you have any class preferences?

USER: I prefer business class for this trip.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: No, thanks for asking.

ASSISTANT: Can you please provide your name to proceed further?

USER: My name is Andrew Martinez.

ASSISTANT: Sorry, there are no flights available at your request.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for contacting us, have a nice day.