You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: I am Sharon Jones, can you help me to book a flight from DEN to IAD?

ASSISTANT: I am here to help you, please mention your travelling dates to get a flight for you.

USER: My travelling dates are 09/02 and 09/04.

ASSISTANT: Wait a moment let me check.

USER: Ok.

ASSISTANT: Sorry to inform you, there is no flight running on your route.

USER: NO issues, thank you for your response.

ASSISTANT: Thanks for choosing us, have a good day.