You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Samuel Davis. I am looking for a flight from LAS to OAK, can you help me out please?

ASSISTANT: May I know your trip dates?

USER: My trip dates are from 02/12 till 02/14.

ASSISTANT: Sorry, there is no flight found with your details.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.