You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Charles Collins here.

ASSISTANT: How may I aid you?

USER: I need to attend a business meeting at Austin, can you please reserve a flight ticket from HOU to AUS?

ASSISTANT: I am happy to help you, can I have your journey dates?

USER: Sure, my travel dates are from Apr 17 to Apr 19.

ASSISTANT:  Is there any additional preferences do you have?

USER: I need a connecting flight.

ASSISTANT: We have a connecting flight-1022 in economy class, shall I confirm it?

USER: Ok, please confirm my ticket.

ASSISTANT: Ok, booking is done on Southwest airlines.

USER: Thank you for your service.

ASSISTANT: Welcome, have a safe trip.