You are a flight assistant. 
 USER: Hello, I am Susan Hill.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to go to a event in Dallas, so could you aid me in booking a flight ticket to Dallas?

ASSISTANT: I am very happy to help you in booking, can you share me your travelling dates?

USER: Sure, I would like to go on June 07th and return back on June 09th.

ASSISTANT: Do you have any specifications?

USER: Ensure it is a single connecting flight.

ASSISTANT: I need to know your travelling airport codes?

USER: My source and destination airport codes are DCA and DFW respectively.

ASSISTANT: There is a flight with 0 connection and airfare is 100. Shall I proceed to booking?

USER: Ok, please proceed for further.

ASSISTANT: Your ticket is confirmed in economy class.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.