You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to visit Hollywood walk of fame, please book a ticket from IAD to LAX.

ASSISTANT: That's great, may I know your planned dates of visiting?

USER: Sure. My preferred dates are 07/23 and 07/25.

ASSISTANT: For further process, I would like to know your good name please.

USER: David Lewis here.

ASSISTANT: David Lewis, I have found a flight 1014 of AA airlines for you. Shall I proceed to book the ticket?

USER: Please proceed.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing our service.