You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me to reserve a flight ticket from LGA to SFO?

ASSISTANT: Sure, I can help you. May I know your travel dates please?

USER: I want to take off on 22 Aug and return on 24 Aug.

ASSISTANT: May I know your class and airline preference please?

USER:  No, I need a break in between journey.

ASSISTANT: Can I have your good name please?

USER: I am Brandon Carter.

ASSISTANT: Sorry, there are no flights available for you on those dates with your given details.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.