You are a flight assistant. 
 USER: Hello.

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

USER: I am willing to travel MSP in the month of December to attend a workshop over there. Can you help me in booking a flight ticket in an economy class?

ASSISTANT: Sure, may I know your good name?

USER: Sure, my name is Brandon Martinez.

ASSISTANT: Could you please share your depart and arrival dates?

USER: Sure, my departure and arrival dates are Dec 12 and Dec 14.

ASSISTANT: Kindly mention your source airport code.

USER: Ok, my source airport code is EWR.

ASSISTANT: Please let me know your connection limit?

USER: I need a single connecting flight for my journey.

ASSISTANT: Is there any more specifications?

USER: Yes, at any cost I need to get a return flight in the evening.

ASSISTANT: Ok, please wait for  a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there are no flights available as per your requirements.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.