You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How could I assist you?

USER: Please help me with the flight ticket booking from AUS to DFW, can you assist me?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Ok, please book for the dates Apr 4th and Apr 6th.

ASSISTANT: Do you have any airline preference?

USER: Yes, I need a normal cost airlines for the trip. Please check for that.

ASSISTANT: Please share me your specifications.

USER: Ok, please check for a connecting flight.

ASSISTANT: According to your given information, we found a flight with an United airlines of flight 1004 in an economy class. Can I proceed?

USER: Please book.

ASSISTANT: Your seat has been reserved.

USER: That is great, thank you for assisting me. My name is Karen Clark.

ASSISTANT: Thank you.