You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Katherine Nelson. Can you please help me in booking my flight ticket from MSP to IAD?

ASSISTANT: Your travelling dates please?

USER: My travelling dates are Sept 14 and Sept 16.

ASSISTANT: Here is a connecting flight with flight number 1006 and fare is 100, providing ticket in economy class. Shall I proceed with booking?

USER: Please search for afternoon flight at return time.

ASSISTANT: Here is a connecting flight with flight number 1005 and fare is 300, providing ticket in economy class. Shall I proceed with booking?

USER: Ok, please proceed with booking.

ASSISTANT: Your booking is done in Frontier airlines.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.