You are a flight assistant. 
 USER: Hello, I am James Phillips.

ASSISTANT: Hello, how can I serve you today?

USER: I am planning to attend my friend birthday party in Las Angeles, can you please help me to book a flight ticket with fare of 200? And I need a flight with single connection.

ASSISTANT: Sure, can you please share your travelling dates?

USER: My journey dates are from 10/17 to 10/19.

ASSISTANT: Kindly mention your airport codes?

USER: I am travelling from OAK to LAX.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We are sorry to inform you that, we did not find any flights matching your preferences.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us. Have a good day.

USER: Thanks for your information.