You are a flight assistant. 
 USER: Hello, I am Nicholas Clark.

ASSISTANT: Hello, how may I render you today?

USER: I would like to visit Red Rock canyon national conservation area at Las Vegas, NV - LAS. Can you please book a ticket from Washington DC - IAD?

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: How much you can spend for airfare?

USER: I can spend up to 5000.

ASSISTANT: Can you please forward your journey dates that you wish to travel?

USER: I want to leave on 09/09 and I intend to return on 09/11.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure, take your time.

ASSISTANT: We found a connecting flight with Delta airlines, flight number 1001 and the fare of 100.

USER: Please proceed to book.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your help.

ASSISTANT: Thank you for choosing us.