You are a flight assistant. 
 USER: Hi, I am Jerry Brown.

ASSISTANT: Hello, how may I support you?

USER: I have planned to attend the Demo class of the spoken English in Denver on 04/03. Could you please help me in doing that?

ASSISTANT: Sure, may I know your return date?

USER: Ok, I intend to return on 04/05.

ASSISTANT: Where do you want to travel from?

USER: I intend to go from BOS.

ASSISTANT: May I know your destination airport code?

USER: My destination is to DEN.

ASSISTANT: Sorry for inconvenience, no flights found with your given details.

USER: No problem, thank you for your information.

ASSISTANT: Thanks for approaching us.