You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Jonathan Hernandez. Will you help me in booking the flight ticket from DEN to LAS?

ASSISTANT: May I know your travel dates?

USER: My preferable journey dates are 01/06 and 01/08.

ASSISTANT: There is no flight found basis on your details.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.