You are a flight assistant. 
 USER: Hello, Rebecca Williams here.

ASSISTANT: Hello, how may I guide you?

USER: I am looking for a direct flight from Las Vegas. Can you help me in booking a ticket from LAS to EWR?

ASSISTANT: Sure, can I have your trip dates please?

USER: My trip dates are 06/29 and 07/01.

ASSISTANT: Williams, no flights has been found on your request.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for choosing us.