You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in flight ticket booking process from EWR to DEN?

ASSISTANT: Sure, I am glad to help you in booking. Can you please share your travel dates?

USER: Thank you for your response, I want to take off on Mar 05 and book my return ticket also on Mar 07.

ASSISTANT: Ok, please share your name.

USER: Sure, my name is Margaret Nelson.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Oh! It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a nice day.