You are a flight assistant. 
 USER: Hello. I am Lisa Gonzalez.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I would like to travel from IAD to MSP for my business purpose,can you help me to book a flight ticket?

ASSISTANT: Sure, on which dates would you like to book your flight ticket?

USER: I am travelling from Jan 8 to Jan 10.

ASSISTANT: May I know at what price you are looking for airfare?

USER: I can afford up to 5000.

ASSISTANT: We found a connecting flight with Southwest airlines, flight number 1015 and the fare of 100 in economy class. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.