You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I want to meet my client at Las Vegas, can you please help me to book my flight ticket from PHX to LAS?

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

USER: Sure, I will depart on Sept 2nd and return back on Sept 4th.

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

USER: I prefer for a single connection flight.

ASSISTANT: May I know your name for booking purpose?

USER: My name is Nancy Brown.

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

USER: No.

ASSISTANT: Unfortunately, no flights available on your requirements.

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Welcome, thank you for reaching us.