You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you for the day?

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

ASSISTANT: Sure, can you please share your travelling dates?

USER: My travelling dates are from Feb 17-19.

ASSISTANT: Do you have class preference?

USER: No, I am comfortable with any class.

ASSISTANT: Would you like to prefer airline?

USER: I prefer normal cost airline.

ASSISTANT: Do you need connection limit?

USER: I need a connecting flight.

ASSISTANT: Sorry, no flight found in that route.

USER: No problem, thank you for the information.

ASSISTANT: Can you please mention your name?

USER: Sure, I am Patricia Lee.

ASSISTANT: Thank you for choosing us.

USER: Thank you.