You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

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

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

USER: I am planning to travel on Jan 09 and return back on Jan 11.

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

USER: I am looking for a connecting flight.

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

USER: No, I am ok with any connections.

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

USER: My name is Brian Miller.

ASSISTANT: Sorry, no flight are available on your specified dates.

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

ASSISTANT: Welcome, thank you for reaching us.