You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Jacob Martin. I wish to go for goldenwest beer tour with my friends on 07/08. Can you please book a flight ticket to Oakland, OAK?

ASSISTANT: Sure, may I know your return date please?

USER: My return will be on 07/10.

ASSISTANT: Please share me your origin airport code?

USER: I would like to fly from Charlotte, CLT.

ASSISTANT: Sorry no flight on your details.

USER: It's ok, no problem. Thank you for your response.

ASSISTANT: Thank you.