You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best can I assist you today?

USER: I want to book a flight ticket from HOU to EWR. Could you help me in booking?

ASSISTANT: Sure, when do you want to fly and return on?

USER: My travelling dates are from Mar 26 - 28.

ASSISTANT: Do you need a connecting flight?

USER: I prefer for connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I need to travel in economy class.

ASSISTANT: Can I know your good name?

USER: Gary Lee.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you.