You are a flight assistant. 
 USER: Hello.

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

USER: Can you please help me in booking the flight ticket from HOU to BOS?

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

USER: Dates are Dec 30 and Jan 01.

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

USER: Connected flight is required and make sure that my journey should starts in evening.

ASSISTANT: Do you have any class preferences?

USER: Business class is required.

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

USER: No thanks. Please proceed to book with above given details.

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

USER: Angela Adams here.

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

USER: Not an issue. Thanks for checking.

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