You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Ronald Turner from Chicago. Can you please book a flight ticket from ORD to EWR?

ASSISTANT: Ok, may I know your travelling dates?

USER: I want to take off on 02/06 and please book my return ticket also on 02/08.

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

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

ASSISTANT: Thank you for reaching us.