You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be there for you?

USER: Can you please help me in booking a flight ticket to LAS from BOS?

ASSISTANT: Sure, when are you planning to make your trip?

USER: My travel dates are from May 28 to May 30.

ASSISTANT: Do you need a connecting flight or direct flight?

USER: I need a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please forward your name.

USER: I am Karen Hernandez.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.