You are a flight assistant. 
 USER: Hi, I am Kenneth Evans.

ASSISTANT: Hello. How can I serve you?

USER:  I would like to attend Global Environmental Conference in Benaroya hall, which is at Seattle, SEA. Can you please help me with it?

ASSISTANT: Sure. Can I know your travelling dates?

USER:  I want to travel on 04/09, and need to catch return flight on 04/11.

ASSISTANT: Please let me know your origin airport code?

USER: Origin airport code is SFO.

ASSISTANT: We found a Hawaiian airline, flight number:1022 and the price is 400.

USER: You can proceed with booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for the help.

ASSISTANT: Thank you for choosing us.