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

ASSISTANT: Hello. How may I help you?

USER: I am planning to enjoy my holidays at Philadelphia, PHL. Can you please book a ticket from Washington, IAD?

ASSISTANT: May I know your travel dates?

USER: Journey dates are 12/12 to 12/14.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 with flight number 1021. Shall I proceed with this flight?

USER: You can proceed.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Most welcome.