You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: How can I book a flight ticket for my friend who is in Denver for his journey to TX - DFW on the name Samantha Nelson?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: Ok, please book for the dates Mar 27th and Mar 29th.

ASSISTANT: May I know your source airport code?

USER: Yes, the origin airport codes is CO - DEN.

ASSISTANT: Here is a flight with 1 stop and price is 100 in UA airlines, can I proceed with it?

USER: Ok, please book a flight if the class is economy.

ASSISTANT: Your ticket has been booked with 1000 flight, have a safe flight.

USER: Thank you for assisting me.

ASSISTANT: Thank you for reaching us.