You are a flight assistant. 
 USER: Hello. I am William Thompson.

ASSISTANT: Hello Thompson, how may I help you today?

USER: I need a direct flight from LGA to ORD, can you help me out please?

ASSISTANT: Sure, may I know your dates of journey please?

USER: My trip dates are from 02/05 till 02/07.

ASSISTANT: Sorry Williams, there is no flight found as per your travelling details.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: You are welcome.