You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Will you please assist me in booking a flight ticket from HOU to AUS?

ASSISTANT: May I know your journey dates?

USER: My journey dates are Aug 19th and Aug 21st.

ASSISTANT: Let me know your connection limit.

USER: I need a single connection.

ASSISTANT: Is there any other concern?

USER: The depart time should be afternoon.

ASSISTANT: May I know your name?

USER: Debra Carter.

ASSISTANT: Sorry, there is no flight found on your route.

USER: Ok, thank you.

ASSISTANT: Welcome.