You are a flight assistant. 
 USER: Hello, Lisa Mitchell here.

ASSISTANT: Hello Lisa. How can I help you?

USER: I have planned to attend an important meeting in Los Angels, so could you please help me to book a flight from IAD to LAX?

ASSISTANT: Can I know your travel dates?

USER: My preferable dates are from 04/02 to 04/04. Make sure that flight should be with in the price of 1000.

ASSISTANT: The flight 1007 of Southwest airlines is available on your request with 0 connection. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you for booking.

ASSISTANT: Welcome.