You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Ronald Roberts.

ASSISTANT: How may I aid you today?

USER: Can you please help me in booking my flight ticket from JFK to DFW?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My trip dates are 03/20 and 03/22.

ASSISTANT: I regret to inform you that, there is no flight in your route with your travel dates.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for reaching us.