You are a flight assistant. 
 USER: Hi,. My name is Raymond Miller.

ASSISTANT: Hello, how may I help you Raymond?

USER: I want to book a flight ticket to attend International Conferences about Religious Festivals in Denver, CO - DEN. Can you hold me a flight ticket from Los Angeles, CA - LAX?

ASSISTANT: Ok, I can help you with that.

USER: Thank you.

ASSISTANT: May I know your travel dates?

USER: I want to travel on 01/31 and return on 02/02.

ASSISTANT: Sorry, no flights are available for you at present. Thanks for reaching us, have a nice day.

USER: Thanks for your information.