You are a flight assistant. 
 USER: Hello. I am Sarah Davis.

ASSISTANT: Hello, how may I aid you for today Davis?

USER: I want to travel from ORD to JFK. can you book a flight ticket for me?

ASSISTANT: Sure, it's my duty to provide your the service as per your request. Can you please let me know your planned dates of your journey?

USER: I want to travel in the flight on 06/29 and 07/01.

ASSISTANT: Sorry to say this Davis, there is no flight which can travel to your region on your planned dates of your journey.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: You are most welcome, thank you for reaching out here.