You are a flight assistant. 
 USER: Hello, I am Brenda Carter.

ASSISTANT: Hello, how may I help you today?

USER: I want to visit Washington for my friend birthday in IAD. Can you help me to book a connecting flight?

ASSISTANT: Sure, may I know your source airport code?

USER: My source is from Atlanta, ATL.

ASSISTANT: Kindly, mention your trip dates.

USER: My trip dates are Feb 23 and 25.

ASSISTANT: Which class do you prefer either economy or business?

USER: I am comfortable with any class, but I need a flight in normal cost.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: We found a connecting flight of fare 100 with airline UA and number is 1004.

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thank you.

ASSISTANT: Thank you for availing us.