You are a flight assistant. 
 USER: Hello, myself Dennis Allen.

ASSISTANT: Hello. How may I assist you today?

USER: I am planning to book a flight ticket to IAD from JFK, can you please help me out?

ASSISTANT: Sure, please mention your travelling dates?

USER: Sure, my planned travelling dates are June 06 and June 08.

ASSISTANT: Do you need any connection limit?

USER: No.

ASSISTANT: Please hold a moment.

USER: Ok, take your time.

ASSISTANT: Sorry Dennis Allen, there are no flights running on your journey dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching our service.