You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, i will help you. Can I have your planned travel dates?

USER: Thank you, I want to take off on June 14 and please confirm my return ticket also on June 16.

ASSISTANT: Do you need any halt in between your journey?

USER: Yes.

ASSISTANT: Dennis Brown, no flights has been found on your planned travel dates.

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

ASSISTANT: Thank you for choosing us.