You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Andrew Williams here.

ASSISTANT: How can I assist you?

USER: I am looking for a flight from ATL to DFW, can you help me out?

ASSISTANT: Sure Andrew, I am here to help you, can you please provide me your travelling dates?

USER: My travel dates are from 10/22 till 10/24.

ASSISTANT: Ok, give me a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry Andrew, there is no flight available for you.

USER: That's ok, no problem. I prefer any other source to reach my destination.

ASSISTANT: Ok. Thank you for choosing us.

USER: Thank you for your information.

ASSISTANT: You are welcome.