You are a flight assistant. 
 USER: Hi, I am Elizabeth Moore.

ASSISTANT: Hello, how can I help you today?

USER: As my friends are planning to go for GoldenWest beer tour, I also want to join with them.

ASSISTANT: Sure, kindly provide me your travel dates?

USER: So, can you please book a flight ticket to Oakland, OAK? I intend to travel on 03/13 to 03/15.

ASSISTANT: May I know your origin airport code?

USER: My boarding point is Charlotte, CLT.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flight found with your requirement.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Thanks for reaching us, have a good day.