You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a ticket from PHL to IAD, can you help me?

ASSISTANT: Sure, can you mention your travel dates?

USER: My travel dates are Dec 23 and 25.

ASSISTANT: Is there any connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Any other requirement?

USER: No.

ASSISTANT: Ok, may I know your name to proceed further?

USER: I am Brandon Williams.

ASSISTANT: United Airlines has a connecting flight with number 1002 for fare 100, shall I proceed?

USER: You can book it.

ASSISTANT: Your ticket is reserved in economy class.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.