You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joseph Miller.

ASSISTANT: How can I help you?

USER: Can you please book a flight ticket from JFK to EWR?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: Sure, I need to travel on dates of 08/14 and 08/16.

ASSISTANT: Give me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for contacting us.

USER: Most welcome.