You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Nicholas Jones.

ASSISTANT: How can I help you?

USER: I want to book a ticket from LGA to AUS.

ASSISTANT: When you like to take off from your location?

USER: My travelling dates are 07/21 to 07/23.

ASSISTANT: I found a flight for you and flight ticket costs is 300. Would you like me to book this ticket?

USER: Yes, please booked.

ASSISTANT: Ok. Your ticket has been booked.

USER: Thank you.