You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to attend my sister's Tennis competition in AUS from HOU. Can you find a ticket for me?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my journey dates are 11/08 to 11/10.

ASSISTANT: Sorry, no flights found as per your request. May I know your name?

USER: Yes, I am Charles Mitchell. Ok, thank you for your information.

ASSISTANT: Ok, thank you.