You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Jeffery Gonzalez here. I want to attend my colleague's ring ceremony, can you please book a ticket on dates 09/24 and 09/26?

ASSISTANT: Sure, I will help you out in booking. May I know your airport codes?

USER: My airport codes are from BOS to OAK.

ASSISTANT: Ok, please wait a moment.

USER: Please make sure that I want a direct flight.

ASSISTANT: Thank you for your patience. Sorry, there are no flights available on your required dates.

USER: That's ok, thank you.

ASSISTANT: Most welcome.