You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, may I know your planned travel dates please?

USER: Thank you. I have planned my travel dates as May 28 and May 30.

ASSISTANT: May I know your name please?

USER: Sure, myself Donna Lopez.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I am looking for single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I do not have any more specifications.

ASSISTANT: Donna Lopez, no flights has been found on your planned travel dates.

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

ASSISTANT: Thank you for choosing us.

USER: Most welcome.