You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Samuel Johnson, I want to book a flight ticket from LAX to L\AS.

ASSISTANT: Sure, I will help you out.

USER: Thank you.

ASSISTANT: May I know your travelling dates please?

USER: Sure, my travelling dates are 07/27 and 07/29.

ASSISTANT: Ok, please hold on for a while.

USER: Ok, sure.

ASSISTANT: Sorry, there are no flights found.

USER: Not an issue, anyway thank you for the help.

ASSISTANT: Thank you for reaching us.