You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you today?

USER: Can you help me to book a ticket from Oakland, OAK to Boston, BOS?

ASSISTANT: Sure, may I know your travelling dates?

USER: Ok, please book on the dates Nov 12th and Nov 14th.

ASSISTANT: Ok, Is there any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your name?

USER: My name is Brandon hernandez.

ASSISTANT: Sorry to say that, there were no flights found based on your specified details.

USER: Ok, that is not a problem. Thank you for assisting me.

ASSISTANT: Thank you for availing us.