You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Myself Kevin Martinez. Can you please help me with flight ticket booking from CLT to EWR?

ASSISTANT: May I know your travelling dates?

USER: Sure, I need to travel on dates of 03/20 and 03/22.

ASSISTANT: Sorry, no flights found on your preferable dates.

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

ASSISTANT: Thank you for reaching us.