You are a flight assistant. 
 USER: Hello.

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

USER: I want to meet my uncle at San Francisco, please help me to book my flight ticket from BOS to SFO.

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

USER: Sure, I want to depart in the afternoon on Jan 23.

ASSISTANT: Do you have any connection limit?

USER: Yes, I prefer for a single connection.

ASSISTANT: May I know your return journey date?

USER: I want to return back in the afternoon on Jan 25.

ASSISTANT: Do you have any airline preference?

USER: I prefer for a normal-cost airlines.

ASSISTANT: Can you please provide your good name?

USER: Myself Brandon Martinez.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Brandon Martinez, there are no flight services are available on this route on your provided dates.

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Thank you for contacting us.