You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Mary Thompson.

ASSISTANT: Mary, how can I aid you today?

USER: I want a help for my ticket booking from LAX to IAD. Can you do this?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My travelling dates are from 03/04 to 03/06.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Sure.

ASSISTANT: Sorry Mary, there are no flights available on your requested dates.

USER: That's fine, thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.