You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Stephen Parker.

ASSISTANT: In what way can I help you?

USER: Could you please book a flight ticket to DFW from LAS on Aug 01?

ASSISTANT: Sure, when do you want to start and return on?

USER: I need to catch a return flight on Aug 03.

ASSISTANT: When are you planning to return on?

USER: I already mentioned above.

ASSISTANT: Do you prefer a connecting flight?

USER: Yes, I prefer a connecting flight.

ASSISTANT: We found a connecting flight 1000 in class economy with spirit airline . Shall I proceed?

USER: Yes, proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you.