You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Thomas Nelson here.

ASSISTANT: Nelson, how can I aid you today?

USER: I am looking a flight from IAH to LAS to meet my sister, can you help me in booking?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My planning dates are 11 and 13 of Dec.

ASSISTANT: Ok, hold on for a moment. Let me check.

USER: Sure, take your own time.

ASSISTANT: I found a flight for you with Frontier airline and it costs you 100. Shall I proceed?

USER: Ok, proceed to booking.

ASSISTANT: Your ticket has been booked with 1013 flight number.

USER: Thanks for helping me.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.