You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I need to book a flight ticket from ATL to IAH, Can you please help me for booking?

ASSISTANT: Sure, can you share your trip dates?

USER: I would like to travel on 03/05 to return on 03/07.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your name?

USER: George Harris here.

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

USER: Ok,no problem. Thanks for your information.

ASSISTANT: Thank you for opting us.