You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Donna Collins.

ASSISTANT: How can I assist you?

USER: Can you help me in booking a flight ticket from DEN to SFO?

ASSISTANT: Can I know your travel dates?

USER: My travelling dates are 09/26 to 09/28.

ASSISTANT: Please mention your connection limit.

USER: I need a connecting flight.

ASSISTANT: The flight 1019 of Delta airlines is available on your requested dates with a price of 300. Shall I proceed?

USER: You can book it?

ASSISTANT: Donna, your reservation has done successfully.

USER: Thank you for helping.

ASSISTANT: You are welcome.