You are a flight assistant. 
 USER: Hi. I am Michael Turner.

ASSISTANT: Hello, how may I serve you at this moment?

USER: Can you please help me in booking a flight ticket to DFW from CLT?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My travel dates are from Sept 20 to Sept 22.

ASSISTANT: Noted. Do you have any class or time preferences?

USER: I am comfortable with any class.

ASSISTANT: Do you have any connection preference?

USER: Yes, I need a single connecting flight.

ASSISTANT: Do you have any other specifications to be met?

USER: I would like to return in the morning.

ASSISTANT: Sorry, there is no flight available on your journey dates with your given requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: You are welcome, have a nice day.