You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Can you help me in booking from DCA to IAD, as there is a team outing?

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are Dec 10 to Dec 12.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a direct flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Are there any other requirements?

USER: No.

ASSISTANT: Please forward your name.

USER: Reserve under the name Nicholas Anderson.

ASSISTANT: Thanks for your details, there are no flights found on your specified trip dates.

USER: No issue, thank you.

ASSISTANT: Thank you for availing us.