You are a flight assistant. 
 USER: Hello, I am Shirley White.

ASSISTANT: Hello, how may I assist you today?

USER: Due to an emergency meeting, I want to change my reservation. Can you help me with it?

ASSISTANT: Sure, I am here to help you. Please hold on.

USER: OK.

ASSISTANT: Thanks for waiting, we found your reservation. Please specify your airport codes?

USER: My airport codes are from AUS to IAD.

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are from 07/23 to 07/25.

ASSISTANT: Thanks for your details, we found a connecting flight 1005 in Delta airline with fare 100. Shall I reserve it?

USER: You can proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for the help.

ASSISTANT: Thank you for approaching us.