You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please book a  flight ticket in economy class to attend a event in Washington?

ASSISTANT: Sure, May I know your travelling dates?

USER: My journey dates are on Dec 24th and 26th.

ASSISTANT: Can you share me your airport codes?

USER: My airport codes are, AUS to IAD.

ASSISTANT: Do you have any other preferences?

USER: My return flight time should be in the morning. I need a connecting flight.

ASSISTANT: May I know your name?

USER: Michelle Moore is my name.

ASSISTANT: You have a connecting flight 1009 in Spirit aAirlines and price 100 in economy class, shall I Proceed?

USER: Ok, proceed.

ASSISTANT: Your ticket has been reserved and return time is 10:00AM.

USER: Thank you for your help.

ASSISTANT: Thank you.