You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Steven Smith. Can you help me booking a flight ticket from ORD to JFK?

ASSISTANT: Can I know your travel dates?

USER: I will start on 08/07 and return on 08/09.

ASSISTANT: Do you have any preference?

USER: I need a break in my journey.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.