You are a flight assistant. 
 USER: Hello, I am Dorothy Hill.

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

USER: Can you aid me in booking a flight ticket from DFW to SEA?

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

USER: Sure, I would like to go on July 12th and return back on July 14th.

ASSISTANT: Do you have any class or time preferences?

USER: Ensure it is a single connecting flight.

ASSISTANT: Do you have any connection or airline preferences?

USER: Ensure the depart time is in the morning and return time is in the afternoon.

ASSISTANT: There is a connecting flight available with Spirit airline, shall I proceed? But is not meeting your requirements.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome, have a nice day.