You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am David Martinez.

ASSISTANT: How can I assist you?

USER: Can you help me to book a flight from DEN to AUS?

ASSISTANT: Sure, can I know the travel dates please?

USER: My travelling dates are 03/03 and 03/05.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

ASSISTANT: There is a flight in Spirit airline with price 200, can I book it?

USER: Proceed with booking.

ASSISTANT: Your ticket has been booked with flight number 1000.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us.