You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Rachel Edwards here.

ASSISTANT: How can I aid you today?

USER: I would like to visit Denver for a business meeting, can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, I can aid you with that. May I know your travel dates for booking flight ticket?

USER: Sure, I am wiling to travel on 09/23 and please book my return ticket on 09/25.

ASSISTANT: Can you please mention your preferable airport code names?

USER: Sure, I want to travel from IAH to DEN.

ASSISTANT: Ok, please hold on a moment, I will check flight availability.

USER: Ok, take your time to check.

ASSISTANT: I have found a flight in this route airline is Southwest and flight number is 1009. Are you ok with this flight?

USER: Yes, I am ok with this, you can proceed with booking.

ASSISTANT: I have confirmed your flight ticket successfully.

USER: Thank you for your assistance in booking of my ticket.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Welcome.