You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to travel from DTW to IAD. Can you help me to book a flight ticket?

ASSISTANT: Sure, can you share your trip dates?

USER: I want to travel in the flight on Feb 14 and Feb 16.

ASSISTANT: Do you have any connection limit?

USER: I want to travel in a connecting flight.

ASSISTANT: Is there any class preference?

USER: I prefer to travel in business class.

ASSISTANT: Are there any other specifications?

USER: No.

ASSISTANT: Please forward your name.

USER: Alexander Jackson.

ASSISTANT: Sorry, there are no flights found on your specified trip dates.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you.