You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I'm Joseph Green, Can you help me booking flight from SEA to DCA?

ASSISTANT: Can I know your travel dates?

USER: Ok, my trip date are from 01/15 to 01/17.

ASSISTANT: The flight 1012 of Hawaiian airlines is available on your requested dates. Shall I proceed?

USER: Please book my ticket.

ASSISTANT: Green, your reservation has been done successfully.

USER: Thank you for your response.

ASSISTANT: You are welcome.