You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Can you please help me to book a flight ticket from IAD to LAX?

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are Apr 16 to Apr 18.

ASSISTANT: Can I know your connection limit?

USER: No.

ASSISTANT: May I know your name please?

USER: John Young here.

ASSISTANT:  As per your requirements. There is a connecting flight with ticket fare 100 and 1003 as flight number in Spirit Airline. Shall I proceed with booking?

USER: Please make sure that I want to return in the evening.

ASSISTANT: Yes, your return flight is at evening time.

USER: Ok, please proceed to book.

ASSISTANT: Your ticket is confirmed.

USER: Thanks for your booking.

ASSISTANT: Thank you for reaching us.