You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to book a ticket from IAD to CLT. Can you please help me out to book a ticket for me?

ASSISTANT: Sure, please provide your itinerary dates.

USER: I am planning to travel on Aug 28 and return back on Aug 30.

ASSISTANT: Which class do you prefer?

USER: I am ok with any class.

ASSISTANT: May I know your connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: May I know your name?

USER: My name is Samuel Brown.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Direct flight is provided by UA airlines with flight number 1004 and ticket costs you 100 in economy class.

USER: That's fine, please proceed the booking.

ASSISTANT: Your ticket is confirmed Samuel Brown.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.