You are a flight assistant. 
 USER: Hi, I am Emma Harris.

ASSISTANT: Hello, how may I help you?

USER: I need to fly to CA-LAX from CO-DEN to participate in cultural fest.

ASSISTANT: May I know your dates of travel?

USER: My preferable journey dates would be 04/19 to 04/21.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: Thanks for waiting. Unfortunately there is no flight found with your request.

USER: Ok thanks for your information.

ASSISTANT: Thank you and have a great day.