You are a flight assistant. 
 USER: Hello. I am Susan Mitchell.

ASSISTANT: Hello, how may I oblige you today?

USER: Can you please help me in booking a flight ticket from IL-ORD to PA-PHL?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: My travel dates are from 06/23 to 06/25.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok, that's fine. I can prefer any other source to reach my destination. Thank you for your help.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.