You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Cynthia Carter, want to travel from AUS to DFW. Please help me in booking my ticket.

ASSISTANT: Sure, can you please share your travel dates?

USER: Sure, my travelling dates are from 05/05 to 05/07.

ASSISTANT: Let me check for the availability of flight.

USER: Sure.

ASSISTANT: Cynthia, I am sorry to inform you that there is no flight available at your requested dates.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for contacting us.