You are a flight assistant. 
 USER: Hi. This is Alexander Nelson.

ASSISTANT: Hello, how may I help you today?

USER: I want to book a ticket from DC - DCA to NC - CLT. Can you help me in that?

ASSISTANT: Please share your trip dates.

USER: My travel dates are 12/09 - 12/11.

ASSISTANT: Ok, do you need any preferences?

USER: I need a direct flight in the range of 5000.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say that, there are no flights available on the route of your journey.

USER: Ok, it is not an issue. Thank you for your service.

ASSISTANT: Thank you for reaching us.