You are a flight assistant. 
 USER: Hello, I am Sharon White.

ASSISTANT: Hello, how may I assist you?

USER: I have planned to visit the Washington Monument so, can you please book a ticket from Las Vegas, LAS?

ASSISTANT: Sure, can you please specify me your dates of travel?

USER: I want to travel on 05/21 and need to catch a return flight on 05/23.

ASSISTANT: May I know your destination airport code?

USER: Washington airport code is IAD.

ASSISTANT: There is a connecting flight with price 100, can I book it?

USER: Yes, please book it.

ASSISTANT: Your ticket has been booked, have a safe journey.

USER: Thank you for booking my ticket.

ASSISTANT: Welcome.