You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at this moment?

USER: Can you please book a flight ticket in business class to attend a meeting in New York?

ASSISTANT: Sure, may I know your travel dates?

USER: My journey dates are on Dec 17th and 19th.

ASSISTANT: Thank you, may I know your nearest airport codes?

USER: My airport codes are IAH to EWR.

ASSISTANT: Do you have airline preferences?

USER: No.

ASSISTANT: Do you have any another preferences on your journey?

USER: I need a connection in between journey.

ASSISTANT: Sure, may I know your name for the documentation purpose?

USER: My name is Stephen Perez.

ASSISTANT: Unfortunately, no flights available on your requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Welcome, thank you for reaching us.