You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Paul Lee here. I would like to book a ticket from AUS to CLT, can you please help me with that?

ASSISTANT: Sure, can you share your trip dates?

USER: The travel dates are from 04/21 to 04/23.

ASSISTANT: Do you have any preferences?

USER: My depart time is at evening.

ASSISTANT: Give me a minute.

USER: I need a flight with 1 connection limit.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.