You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Brandon Parker. I want to book a ticket to Austin, TX - AUS from Atlanta, ATL to meet my grandfather. Can you help me to book a ticket?

ASSISTANT: Sure, when are you planning to travel?

USER: I want to travel on 11/29 and 12/01.

ASSISTANT: Please provide your specifications.

USER: I want to single halt with in 200.

ASSISTANT: Unfortunately, there is no flights available with your details.

USER: Okay, not a problem. Thank you.

ASSISTANT: Thank you for choosing us.