You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Patricia Young.

ASSISTANT: How may I help you?

USER: I have an event to attend at Washington. Can you help me in booking a ticket from IAH to IAD?

ASSISTANT: May I know your trip dates?

USER: My planned journey dates are 10/18 and 10/20.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: I have found a flight 1011 with price 100, shall I proceed?

USER: Please book the ticket.

ASSISTANT: Your booking is done, have a nice journey.

USER: Thank you for your service.

ASSISTANT: Welcome.