You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you aid me to book a flight ticket from DEN to SEA?

ASSISTANT: Sure, may I know your travelling dates?

USER: I planned my trip on the dates Apr 8 and Apr 10.

ASSISTANT: Can you please share me your requirements?

USER: I prefer afternoon flight for my return journey and I am looking for a direct flight.

ASSISTANT: Kindly mention your name please?

USER: Myself Samuel White.

ASSISTANT: Unfortunately there is no flight found with your given information.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you.