You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Melissa King. I would like to travel from JFK to ORD.

ASSISTANT: Ok, please help me with your travelling dates.

USER: My preferable dates are from 10/22 to 10/24.

ASSISTANT: Sorry, no flights are available on your given details.

USER: That's ok. Thank you.

ASSISTANT: Most welcome.