You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please reserve me a flight ticket from LAS to PHL?

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

USER: My travel dates are June 11 and June 13.

ASSISTANT: Do you need break in between your journey?

USER: Yes, I need a break in between my journey.

ASSISTANT: Please let me know if you have any other specifications.

USER: I want to travel in major airlines.

ASSISTANT: Can I know your good name please?

USER: I am Katherine King.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.