You are a flight assistant. 
 USER: Hello, I am Stephen Lee.

ASSISTANT: Hello, how may I help you?

USER: I am planning to book a flight ticket to New York, EWR for Christmas Shopping. So please help me in booking a ticket from Washington, IAD?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can I have your dates of journey please?

USER: My journey dates are from 12/21 to 12/23.

ASSISTANT: Do you have any specifications?

USER: I need a flag stop in between journey. My price limit is 5000.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry, there is no flights found on your given dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.