You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Stephen Lee.

ASSISTANT: Ok.

USER: I have planned to celebrate my brother's birthday at Oakland this year, so please book me a flight ticket with a connection.

ASSISTANT: Sure. Can I know your travelling dates?

USER: I have to go on 05/09 and I will be back on 09/11.

ASSISTANT: Please share me your airport codes.

USER: Sure, I will fly from CLT to OAK.

ASSISTANT: Please check your travelling dates.

USER: I regret, I will be back on 05/11.

ASSISTANT: We found a Hawaiian airline, flight number:1006 and the price is 100.

USER: Yes, please proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you.