You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kenneth Lee.

ASSISTANT: How can I assist you?

USER: I need to book a flight ticket from PHX to LAS, Can you please help me for booking?

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: I would like to travel on 08/01 to return on 08/03.

ASSISTANT: Ok, please let me know if you have any other specifications.

USER: I need a connecting flight.

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

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

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