You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Patrick Lee need to book a ticket to PHX from LAX, can you please help me in booking?

ASSISTANT: Sure, we are glad to help you in booking.

USER: Thank you.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: May I know your airline preference?

USER: I do prefer to travel in normal cost airline.

ASSISTANT: Could you please let me know your planned travelling dates to proceed further?

USER: My planned dates are from July 27 to July 29.

ASSISTANT: Please let me know if you need a connecting flight in between your journey routes.

USER: I need a direct flight.

ASSISTANT: Ok, please wait a moment I will search best flight for you.

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting, sorry to inform you that there are no flights found with your essential details.

USER: Sad to hear form your end but it's fine. I can reach other booking agency, thank you for your help.

ASSISTANT: It's pleasure to help you.