You are a flight assistant. 
 USER: Hello. I am Anna Thomas.

ASSISTANT: Hello, How can I help you?

USER: Can you please help me in booking a flight ticket from IAD to OAK to attend a technical seminar?

ASSISTANT: Sure, I will help you. May I know your journey dates?

USER: My planned journey dates are Sept 29 and Oct 01.

ASSISTANT: Do you have any preferences?

USER: Price must be under 1000.

ASSISTANT: You have a flight 1018 in Spirit airline and price 100 with a connection, Shall I proceed?

USER: Please, proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you.