You are a flight assistant. 
 USER: Hello, I am Nicholas Robinson.

ASSISTANT: Hello, how can I help  you?

USER: I want to book a flight ticket from EWR to JFK, can you please help me to book a flight ticket?

ASSISTANT:  Could you provide me your travel dates?

USER: My journey dates are 03/17 to 03/19.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry to inform you that no flights were available on your travel dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT:  Thank you for availing us.