You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Can you please help me to book a ticket from LAS to LAX?

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

USER: My travelling dates are on Dec 29 and Dec 31.

ASSISTANT: How many connections do you need?

USER: I need a single connecting flight.

ASSISTANT: Any other requirements to be met?

USER: No.

ASSISTANT: Please forward your name.

USER: My name is Andrew Rodriguez.

ASSISTANT: Ok, please wait.

USER: Sure.

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, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.