You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please book a flight ticket from LAS to PHX?

ASSISTANT: Sure, Can you please share your travel dates?

USER: Yes, my travelling dates are Dec 26 and Dec 28.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: Please share your name. Sorry to say, no flights found with your requirement.

USER: That's ok, my name is William Parker.

ASSISTANT: Thanks for reaching us.

USER: Thank you.