You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Ronald Jackson. I need to travel from DEN to LAX, can you help me out please?

ASSISTANT: Can you share your planning dates of your journey?

USER: My trip dates are from 04/10 till 04/12.

ASSISTANT: Please let me a moment.

USER: Ok.

ASSISTANT: Sorry, no flights available on your required dates.

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

ASSISTANT: Thank you for reaching us.