You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Sandra Perez here.

ASSISTANT: Sandra Perez, how can I aid you today?

USER: I want to book a flight to visit DFW on this weekend, can you please check for a flight from AUS?

ASSISTANT: Sure, I am here to help you. Can you please share me your travel dates?

USER: My travelling dates will be from 12/17 to 12/19.

ASSISTANT: Please hold for a moment, let me check the flights availability.

USER: Sure.

ASSISTANT: I am very sorry to say, there are no flights found in your route as per your travel dates?

USER: That's fine, thank you for checking.

ASSISTANT: Thank you for reaching us, have a great day.

USER: You are most welcome.

ASSISTANT: Most welcome.