You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Michael Adams.

ASSISTANT: How can I serve you?

USER: I want to book a flight ticket from TX-DFW to CA-LAX, help me in booking my flight ticket.

ASSISTANT: Sure. May I know your travelling dates?

USER: 02/03 is my starting date, my return date will be 02/05.

ASSISTANT: Do you have any preferences?

USER: I need a direct flight.

ASSISTANT: There is no direct flight available to your destination.

USER: No problem, thank you.

ASSISTANT: Thank you.