You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Michelle Baker, I want to attend entrepreneur meeting at Chicago. Can you please help me in reserving the ticket from LAS to ORD?

ASSISTANT: Sure, can you please share me with your dates of travel?

USER: I am willing to take-off 09/11 and again I will retrieve on 09/13.

ASSISTANT: Ok, wait for a moment please.

USER: Sure, I will wait for your kind response.

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

USER: Not a big deal, anyway thank you very much for your kind service.

ASSISTANT: You are welcome always.