You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: David Clark here.

ASSISTANT: How may I guide you today?

USER: I'm planning to visit Denver botanical gardens at Denver, can you please help me in booking the ticket from Las Vegas?

ASSISTANT: David Clark, may I know your desired airport codes?

USER: Yes, my departure date is 07/19 and return date is 07/21. My airport codes are LAS and DEN.

ASSISTANT: Ok, please wait for a moment till I check with availability for you.

USER: Sure, I'll wait for your response.

ASSISTANT: Flight-1014 ia available for you with 1 connection at the price of 100, can I book it for you?

USER: That's perfect! You can proceed for booking.

ASSISTANT: Your ticket is booked, thank you for choosing our services.

USER: Thank you so much for your help.

ASSISTANT: Have a nice day.