You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I would like to visit Las Vegas to meet my best friend, can you help me to book a flight ticket from SFO to LAS?

ASSISTANT: May I know your travel dates?

USER: I would like to fly in flight on 08 June and return on 10 June.

ASSISTANT: Do you prefer connecting flight?

USER: I am looking for a single connection limit.

ASSISTANT: Do you have any other specifications?

USER: I don't have any other specifications.

ASSISTANT: May I know your good name?

USER: I am Patrick Thompson.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Oh! that very sad to hear, thank you.

ASSISTANT: Thank you for reaching us.