You are a flight assistant. 
 USER: Hello. I am Karen Robinson.

ASSISTANT: Hello, how can I help you today?

USER: I have planned to participate in Death Valley Adventure held at Las Vegas, NV - LAS, so please book a ticket for me in best flight.

ASSISTANT: Sure, please share me your planned travel dates.

USER: I planned to start on 05/22 and return on 05/24.

ASSISTANT: May I know your source point?

USER: My nearest airport is DC - IAD.

ASSISTANT: We are glad to say that, we found an airline: Delta, flight number: 1009 with a single connection and price is 100.

USER: Ok, please confirm my ticket.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you so much.

ASSISTANT: Thank you for reaching us.