You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Nicholas Collins.

ASSISTANT: How can I help you?

USER: I want to travel from LAS to DFW, can you please help me to book my flight ticket?

ASSISTANT: Sure, may I know your journey dates please?

USER: I will depart on 05/20 and return back on 05/22.

ASSISTANT: I found a flight in Delta airlines with price 100. Can I book the ticket for you?

USER: Sure, please book the ticket.

ASSISTANT: Your ticket is confirmed and the flight number is 1014.

USER: Thank you very much.

ASSISTANT: Thank you for contacting us.