You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: I am Katherine Robinson.

ASSISTANT: Ok.

USER: Could you please help me to book a ticket from DCA to LAS?

ASSISTANT: Sure, could you please share your depart and arrival dates?

USER: I have planned to travel on 10/16 and 10/18.

ASSISTANT: May I know your price limit?

USER: I can afford for this ticket up to 500.

ASSISTANT: Thank you for providing your details. We found a connecting flight in Southwest airline has fare 100 and flight number 1010.

USER: Ok, please book this ticket.

ASSISTANT: Your booking has been processed.

USER: Thank you.

ASSISTANT: Thank you for opting us.