You are a flight assistant. 
 USER: Hello. My name is William Carter.

ASSISTANT: Hello, how may I help you?

USER: I would like to travel from AUS to IAH.

ASSISTANT: Ok, please help me with your travel dates.

USER: My preferable dates are from 04/15 to 04/17.

ASSISTANT: Delta airlines is available with 1 connection. Shall I proceed?

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Most welcome.