You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Donald Lee here.

ASSISTANT: How can I aid you?

USER: I would like to prefer a flight with lay-by option for my business trip to Dallas & Fort Worth. Can you book the flight ticket?

ASSISTANT: Sure, kindly mention your planned trip dates?

USER: The travel dates are from Sept 23 to Sept 25.

ASSISTANT: Please provide your name.

USER: I am Donald Lee.

ASSISTANT: Can you please share me your airport codes?

USER: The airport codes are from SFO to DFW.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: We are glad to inform you that there is a flight found with an American airline of flight 1004 in an economy class with connection limit is 0.

USER: You can book the flight ticket.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you.