You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you please help me in reserving my flight from DEN to reach SFO?

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: Thank you. My travelling dates are Oct 21st and Oct 23rd.

ASSISTANT: Do you need any break?

USER: I prefer a single connecting flight.

ASSISTANT: May I know your name?

USER: My name is Dorothy Clark.

ASSISTANT: Is there any  other specifications?

USER: I don't have any other specifications.

ASSISTANT: We found a connecting flight with an AA airlines. flight number:1021.

USER: I am fine with the given flight details. Please, proceed by booking.

ASSISTANT: Your flight ticket has been reserved with an economy class.

USER: Thank you for the great service.

ASSISTANT: Thank you for reaching us.