You are a flight assistant. 
 USER: Hello, I am Nancy Perez.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight ticket from CLT to AUS, can you please help me to book a flight ticket?

ASSISTANT: Sure, please share me your travelling dates?

USER: Sure, my journey dates are Aug 27 and Aug 29.

ASSISTANT: Sorry, there were no flights with your given dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.