You are a flight assistant. 
 USER: Hello, Nancy Mitchell here.

ASSISTANT: Hello, Nancy. What can I do for you today?

USER: I want to travel from 09/20 to 09/22, can you please help me to book the flight ticket on these dates?

ASSISTANT: Sure, I am here to help you out. Please provide me your airport codes.

USER: My airport codes are OAK and OAK.

ASSISTANT: Nancy, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. Nancy, Hawaiian airline is matching with your requirements and it costs only 100.Shall I proceed?

USER: OK, please proceed to book.

ASSISTANT: Your ticket has successfully booked with flight number 1007.Have a safe journey.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.