You are a flight assistant. 
 USER: Hello, I am Katherine Anderson.

ASSISTANT: Hello, how may I help you at this moment?

USER: I would like to go to a event in San Francisco, so could you please book a ticket for me?

ASSISTANT: Sure, I am gleeful to help you. Can you please share your journey dates?

USER: Sure, I would like to go on 07/02 and return back on 07/04.

ASSISTANT: Noted. Please provide your journey dates.

USER: My source and destination airport codes are BOS and SFO.

ASSISTANT: Can I have a moment please?

USER: Ok, ensure it is a direct flight.

ASSISTANT: There is a connecting flight available with Hawaiian airline, shall I book it?

USER: No thanks.

ASSISTANT: Sorry, there is no direct flight available. Thank you for reaching us.

USER: Welcome.