You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I am Ryan Anderson. I need to book a ticket to meet my uncle at Orlando MCO. Could you please help me in booking a ticket from Denver DEN?

ASSISTANT: Please help me with your travel dates.

USER: My travelling dates are 04/17 and return on 04/19.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for availing us.