You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I aid you today?

USER: Carolyn Garcia here, I am planning to travel from OAK to LAX. Could you please help me to book a ticket?

ASSISTANT: Sure, Is there any restriction on price?

USER: Fare is 500.

ASSISTANT: Can I know your planned journey dates?

USER: My travelling dates will be on 11/15 to 11/17.

ASSISTANT: Sorry Carolyn Garcia, there were no flights found with your given details.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thanks for opting us.