You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from my side?

USER: Jack Lewis here. I am looking for a flight from ORD to EWR, can you please find a flight for me?

ASSISTANT: Lewis, please tell me on what dates you need booking?

USER: My planning dates are from 08/21 till 08/23.

ASSISTANT: Sorry, no flights found with your planned travelling dates.

USER: It's ok, thank you.

ASSISTANT: Thank you for the information.