You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you for today?

USER: My name is Stephen Perez, can you please help me in reserving a plane ticket from 05/13 to 05/15?

ASSISTANT: Yes, I can help you. Could you tell me your nearest airport codes?

USER: Sure, my airport codes are from ORD to EWR.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Sorry to say that there is no flight found on your requested dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.