You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Linda Mitchell. I am planning to book a ticket from ATL to ORD. Can you please help me out to book a ticket for me?

ASSISTANT: Sure, I am here to help you. Can you please share your travelling dates?

USER: I would like to travel on 04/09 and return back on 09/11.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Can you please check your travelling dates once again?

USER: My return date is 04/11.

ASSISTANT: Thank you for waiting. There is no flight available on this route based on your details.

USER: That's fine. Thank you for your service.

ASSISTANT: Thank you for reaching us.