You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Charles Mitchel here. I want to book my ticket from ATL to  IAH. Can you help me out in booking a flight ticket?

ASSISTANT: Sure, can you share your trip dates?

USER: My planned trip dates are from Mar 29 to Mar 31.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a connecting flight in my journey.

ASSISTANT: There is a connecting flight with  number 1020 in airline Southwest, the fare is 200. Can I book it?

USER: Yes, you can book it for me.

ASSISTANT: Your ticket is reserved.

USER: Thank you for your help in booking my ticket.

ASSISTANT: Thank you for availing us.