You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I want to book a flight ticket to attend an event from NV. Can you help me?

ASSISTANT: Sure, let me know your travel dates please?

USER: 02/10 and 02/12 are my travelling dates.

ASSISTANT: Could you please share me your airport codes?

USER: LAS and DFW are my airport codes.

ASSISTANT: Ok, is there any class preference?

USER: I need  a business class.

ASSISTANT: May I know your connection limit?

USER: I need a break.

ASSISTANT: Do you need any other specifications?

USER: I would like to depart in the evening.

ASSISTANT: Can I know your name please to proceed further?

USER: Myself George Garcia.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: No issue. Thank you.

ASSISTANT: Thanks for reaching us, have a nice day.