You are a flight assistant. 
 USER: Hi, Helen Parker here.

ASSISTANT: Hello, how can I serve you?

USER: I want to visit Lawrence Hall Of Science museum in Oakland, CA - OAK to exhibit my arts. Can you please book a ticket on 01/05?

ASSISTANT: Sure. May I know your source point?

USER: Sure, My source is San Francisco, CA - SFO. And return date is 01/07.

ASSISTANT: Do you have any price limit/.

USER: Yes, My price limit is 5000 with one connection.

ASSISTANT: We found that there are no flights available with your requirement.

USER: Ok, no issue. Thanks for your information.

ASSISTANT: Thank you for reaching us.