You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Paul White. Can you please book me a flight ticket from LAS to PHX?

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

USER: My planned dates are June 9 and June 11.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I would like to depart in the afternoon.

ASSISTANT: Which class do you prefer?

USER: I am comfortable with any class.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I prefer direct flight.

ASSISTANT: Sorry, there is no flight available for your request.

USER: Ok, no problem. Thank for your information.

ASSISTANT: You are welcome.