You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, What kind of help are you expecting from our side?

USER: Please help me in booking flight ticket from LAS to IAH.

ASSISTANT: Sure, I am euphoric to help you with booking.

USER: Thank you.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My trip dates are Dec 26 to Dec 28.

ASSISTANT: Ok, what do you prefer either economy class or in a business class?

USER: I want to fly in business class.

ASSISTANT: Do you prefer any lay by in between journey?

USER: I need a connecting flight.

ASSISTANT: May I know your good name please?

USER: Myself Gregory Hill.

ASSISTANT: Please be on hold for sometime to check the suitable flight for your journey.

USER: Ok.

ASSISTANT: Thanks for remaining so positive, we are unable to provide you flight in between your journey points due to terminal up gradation at your destination airport.

USER: Ok, no problem. Thank you for your help.

ASSISTANT: Thanks for reaching us, have a great day.