You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you book a flight ticket from SFO to BOS to meet my family?

ASSISTANT: Sure, I am gleeful to help you. Could you please provide your travelling dates to search for the flight?

USER: Apr, 19 and Apr, 21 are my journey dates.

ASSISTANT: May I know your connection limit?

USER: I need single connection.

ASSISTANT: Do you have any requirements?

USER: I need to travel in business class.

ASSISTANT: May I know your name?

USER: Samuel Garcia here.

ASSISTANT: Sorry to say, no flight is available for you as per your requests.

USER: That's ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.