You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to book a ticket from DFW to IAH. Can you please help me out?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I am planning to travel on Nov 16 and return back on Nov 18.

ASSISTANT: Do you have any limits on number of connections?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: May I know your name for the documentation process?

USER: Sure, I am John Gonzalez.

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

USER: I am looking for a business class.

ASSISTANT: Unfortunately, no flights available on your requirements.

USER: That's fine, thank you for your service.

ASSISTANT: Welcome for reaching us.