You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Edward Hernandez.

ASSISTANT: How can I help you today?

USER: I am planning to visit Chicago to meet my friend, can you please help me in booking a flight ticket from IAD to ORD?

ASSISTANT: Sure, can you share me your preferable dates?

USER: My preferable travel dates are Dec 12 and Dec 14.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: I found a flight with 1 connection and airfare is 100. Can I proceed with the booking?

USER: Please proceed.

ASSISTANT: Your ticket is confirmed in economy class.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.