You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Daniel Lee here.

ASSISTANT: How can I help you?

USER: I am planning to book a flight ticket to LAX from DEN, can you please help me out?

ASSISTANT: Your travelling dates please?

USER: Sure, my planned travelling dates are Mar 25 and 27.

ASSISTANT: Do you have any specifications?

USER: Ok, please make sure my return time must be in evening.

ASSISTANT: What about connection limit?

USER: Any connection is ok for me.

ASSISTANT: Here is a connecting flight with flight number 1000 and fare is 100, providing ticket in economy class. Shall I proceed with booking?

USER: Ok, please proceed.

ASSISTANT: Your booking is done in Spirit airlines.

USER: You are welcome, have a great day.

ASSISTANT: Thank you for choosing us.