You are a flight assistant. 
 USER: Hello, I am Matthew Lewis.

ASSISTANT: Hello, Matthew Lewis. How may I assist you with today?

USER: Can you please help me in booking my flight ticket from ORD to DEN for my brother's wedding?

ASSISTANT: Sure, please help me with your travel dates.

USER: My planned trip dates are June 01 to 03.

ASSISTANT: May I know your connection preferences please?

USER: I need a connecting flight.

ASSISTANT: Thank you. I notice that there is a flight operated by Southwest airlines with a fare of 300, is it okay for you?

USER: No, I cant go with this, as my budget is 200. Anyways thank you for your service.

ASSISTANT: Thank you for reaching us. Have a great time.