You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Sarah Walker here. Can you please help me in booking a ticket from AUS to ORD?

ASSISTANT: Sure, I will assist you with that. May I know your travel dates?

USER: My journey dates are 03/24 and 03/26.

ASSISTANT: Ok, please wait a moment. Sorry Walker, as per your journey intents there are no flights available.

USER: That's ok, thank you for giving the information.

ASSISTANT: Sorry for the inconveniences. Thank you for choosing our agency.

USER: Thank you for choosing us.