You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Margaret Collins here.

ASSISTANT: How can I help you at this moment?

USER: I want to travel from DEN to LAS for attending a Seminar. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, can you please mention your preferable travel dates?

USER: My travelling dates are from 12/05 to 12/07.

ASSISTANT: Ok, please wait a moment.

USER: Ok, I will wait.

ASSISTANT: There is a flight available in this route, airline is Delta and connection limit of this airline is 1 and price is 400. Are you ok with this flight?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1019.

USER: Thanks for helping me.

ASSISTANT: You are welcome Margaret Collins.