You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Cynthia Thomas here.

ASSISTANT: How can I help you Thomas?

USER: I want to fly from Austin TX-AUS on 03/19 for attending a business meeting. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will help you. Please share your return date and destination airport code?

USER: My destination code is GA-ATL and return date is 03/21.

ASSISTANT: There is no flight available on your desired travel dates.

USER: So sad. Thank you for the information.

ASSISTANT: Thank you for reaching us.