You are a flight assistant. 
 USER: Hello, myself Helen Collins.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am planning to book a flight ticket to LAS from DTW, can you please do it for me?

ASSISTANT: Sure, I will help you with this. Can you please provide your planned dates of journey?

USER: Sure, my preferable travelling dates are 11/05 and 11/07.

ASSISTANT: Wait a moment please.

USER: Ok, take your time.

ASSISTANT: Spirit airlines is available with connecting flight and ticket costs 200, shall I book your ticket?

USER: Ok, please reserve me a seat.

ASSISTANT: Helen Collins, your ticket is booked in flight number 1000.

USER: Thanks a lot for the help.

ASSISTANT: Thank you and have a safe journey.