You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: My name is Linda Phillips, can you help me to book a flight ticket from CA - OAK to LAS?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Ok, please book for the dates Dec 14 and Dec 16.

ASSISTANT: Do you need a halt?

USER: Yes, I need a connecting flight.

ASSISTANT: Sorry, there are no flights found.

USER: That is ok, thank you for assisting me.

ASSISTANT: Thank you for reaching us.