You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Joseph Garcia. I am planning to visit Angela Island in Oakland, can you please help me in booking a flight ticket?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: I want to start my journey on 04/01 and my return will be on 04/03.

ASSISTANT: Ok, may I know your airport codes?

USER: My travelling air[port codes are from BOS to OAK.

ASSISTANT: Give me a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no flight is found on your route.

USER: It's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.