You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Could you please help me with booking flight ticket from LAS to LAX?

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

USER: My travelling dates are Dec 23 and Dec 25.

ASSISTANT: Can I have your name please?

USER: My name is Anna Thompson.

ASSISTANT: Do you have any connection preference?

USER: I need a direct flight.

ASSISTANT: May I know your other requirements?

USER: I want to depart in the morning.

ASSISTANT: Anna Thompson, no flights has been found on your planned travel dates.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for choosing us.