You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rachel Rodriguez.

ASSISTANT: How could I aid you today?

USER: Can you please help me in booking my flight ticket from CLT to DCA?

ASSISTANT: May I know your trip dates please?

USER: My travelling dates are Dec 09 to Dec 11.

ASSISTANT: Please provide your specifications.

USER: I need direct flight to complete my trip.

ASSISTANT: We are sorry to inform you that there is no flight found with your given name.

USER: Can you please recheck about my flight ticket booking?

ASSISTANT: As per request, I have checked again but I did not find any flights on your route.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for choosing us.