You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Steven Collins. I want to book a ticket to Austin, TX - AUS to attend my friend's wedding. Can you please help me with booking?

ASSISTANT: Sure, please share me your travelling dates?

USER: I would like to depart on 10/29 and return on 10/31.

ASSISTANT: OK, do you have any specifications?

USER: My origin is DC - DCA. Price should be under 500.

ASSISTANT: OK, please wait for few minutes, let me check and revert you.

USER: I need single connection.

ASSISTANT: Sorry to say that there are no flight with your requirements.

USER: Ok, no problem.

ASSISTANT: Thank you, for reaching us.

USER: Thank you for your help.