You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: Can you help me in booking from DFW to DCA, as there is a conference meeting to attend?

ASSISTANT: Sure, please provide your dates of journey.

USER: My trip dates are Aug 8 to Aug 10.

ASSISTANT: Is there any class preference?

USER: I prefer a economy class.

ASSISTANT: Do you have any preferences?

USER: I need a direct flight which depart in afternoon.

ASSISTANT: May I know your name to proceed further?

USER: I am Alexander White.

ASSISTANT: Ok, please wait for sometime.

USER: Sure.

ASSISTANT: Sorry, there is no direct flight available on your route.

USER: No issue, thank you.

ASSISTANT: Thank you for contacting us.