You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I want to book a direct flight to meet my friend, can you help me with booking?

ASSISTANT: Sure, May I know the journey dates?

USER: Thank you. My journey dates are Feb 06 and Feb 08.

ASSISTANT: Please help me with your journey codes.

USER: I will fly from LAS to reach OAK.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Is there any other requirements?

USER: My return time is morning.

ASSISTANT: May I know your name?

USER: I am Ronald Turner.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for availing us.