You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Lisa Nelson.

ASSISTANT: What can I do for you?

USER: I want to visit Zilker park with my friend, can you please help me in booking a flight ticket?

ASSISTANT: Sure, I will help you in booking, can you please provide me your airport codes?

USER: My source code is IAD and my destination code is AUS.

ASSISTANT: Ok, may I know your travelling dates?

USER: My travelling dates are from 04/19 till 04/21.

ASSISTANT: Ok, give me a moment.

USER: Ok, take your own time.

ASSISTANT: Happy to say you that I found a flight-1012 for you with 1 connection.

USER: Please proceed.

ASSISTANT: Your ticket is confirmed. The airline is Spirit.

USER: Thank you for booking.

ASSISTANT: Welcome. Thank you for choosing us.