You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me with booking a flight ticket from IAD to DEN?

ASSISTANT: Can you please share your travelling dates?

USER: My travelling dates are from Jan 25-27.

ASSISTANT: Do you have class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you need connection limit?

USER: I would be comfortable with single stop over.

ASSISTANT: May I know your name?

USER: Alexander Lee here.

ASSISTANT: We found Spirit Airline with fare 100 and flight number is 1026 with connecting flight. Shall I proceed with the booking?

USER: You can proceed with booking.

ASSISTANT: Your booking is done.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.