You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to book a flight ticket from LAX to PHX, can you please help me to book a flight ticket?

ASSISTANT: Sure, please provide your itinerary dates.

USER: Sure, my travelling dates are July 11 and July 13.

ASSISTANT: Do you have any particular specifications?

USER: I need a direct flight.

ASSISTANT: May I know your name?

USER: My name is Benjamin Evans.

ASSISTANT: Do you have any preferences?

USER: No.

ASSISTANT: Sorry Benjamin Evans, no direct flight is available on your route.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.