You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please book a ticket from IAD to JFK to go for long trips?

ASSISTANT: Please provide me the travel dates.

USER: My travelling dates are Oct 5 and Oct 7.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any connection limit?

USER: I want a direct flight.

ASSISTANT: Are there any more preferences that you want to avail?

USER: No.

ASSISTANT: Let me know your name please?

USER: Sure, I am James Anderson.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: James Anderson. I regret to inform that there are no flights on your route with the given dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.