You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to book a direct flight to Phoenix to meet my grandparents, can you please help me?

ASSISTANT: Sure, can I know the travel dates please?

USER: I want to travel on 01/20 and need to return on 01/22.

ASSISTANT: Could you provide the airport codes please?

USER: My source is at Los Angeles, CA-LAX and destination is at Phoenix, AZ-PHX.

ASSISTANT: May I know your name to proceed further?

USER: I am Robert Harris.

ASSISTANT: There is a flight with connection 1 and price is 300, can I book it?

USER: Do not proceed with booking. I have requested you for direct flight.

ASSISTANT: Sorry, there are no direct flights.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you.