You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Larry Lopez. I am planning to meet my parents after a long time in JFK, will you please assist me in booking a flight ticket from ORD?

ASSISTANT: Sure, I am here to help you with that. Can I know your travelling dates?

USER: My travelling dates are Jan 14th and Jan 16th.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: Ok, no worries at all. Thank you.

ASSISTANT: Thank you for reaching us.