You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Please help me out in booking the ticket from IAH to LAX.

ASSISTANT: Sure, can you please provide me your travel dates?

USER: My trip dates will be 03/19 to 03/21.

ASSISTANT: May I know your name.

USER: Stephen Anderson is my name.

ASSISTANT: Sorry, there are no flights found on your preferable dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.