You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to book a flight ticket to LAS from SFO, can you please help me out?

ASSISTANT: Sure, I'm glad to help you with that. May I know your planned departure and return travel dates please?

USER: Sure, my trip dates are Jan 17 and Jan 19.

ASSISTANT: Do you need stopover in between your journey?

USER: I am looking for a flight with 1 connection.

ASSISTANT: Please let me know if you have any other specifications.

USER: I prefer economy class.

ASSISTANT: May I know your good name please?

USER: My name is Angela Walker.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: It's ok, thank you for the information.

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