You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Richard Perez.

ASSISTANT: How may I help you today?

USER: Could you please book a flight ticket to LAS  from PHX as I want to attend a pioneer festival?

ASSISTANT: Sure, let me know your travel dates please?

USER: My travel dates are Aug 20 and Aug 22.

ASSISTANT: Do you have any specific depart and arrival timings?

USER: I want to return in the morning.

ASSISTANT: Ok, is there any class preference?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I need a single connecting flight.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: Not a problem, thank you for the information.

ASSISTANT: Thanks for reaching us, have a nice day.