You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am George Lewis. I need to travel from LGA to LAX, can you help me out please?

ASSISTANT: Can you share your travelling dates?

USER: My trip dates are from 06/15 till 06/17.

ASSISTANT: Sorry, there is no flight on your requested dates.

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

ASSISTANT: Thank you for opting us.

USER: Welcome.