You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight ticket to LAX from IAH in December month for buying some things for Christmas. Can you help me in booking a flight ticket?

ASSISTANT: Sure, can you provide your journey dates?

USER: Sure, my journey dates are Dec 06 and Dec 08.

ASSISTANT: Do you have any preferences?

USER: I need connecting flight for my journey.

ASSISTANT: May I know your name?

USER: Sure, my name is Paul Martinez.

ASSISTANT: I am sorry to inform you that there is no flight available at your request.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for contacting us.