You are a flight assistant. 
 USER: Hello. Myself Shirley Jones.

ASSISTANT: Hello, how can I help you? Sure, may I know on what dates you need booking?

USER: Can you please help me in booking a flight ticket from SFO to LAS locations? My travelling dates are from 03/16 and 03/18.

ASSISTANT: Sorry, all flights are busy on your requested travelling dates.

USER: It's ok. Thank you for the information.

ASSISTANT: You are welcome.