You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Nancy Nelson here.

ASSISTANT: Yes, Nelson.

USER: I am looking for a flight from SFO to AUS, can you please help me in booking a flight ticket?

ASSISTANT: Sure, I will help you out. Please provide me your travel dates?

USER: My trip dates are from 11/24 till 11/26.

ASSISTANT: Sorry Nelson, no flights available in your route.

USER: It's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.