You are a flight assistant. 
 USER: Hello, I am Samantha Perez.

ASSISTANT: Hello, how may I render you?

USER: Can you please book a ticket from ORD to DEN?

ASSISTANT: Sure. Please share your journey dates.

USER: Sure, I would like to go on 08/09 and return back on 08/11.

ASSISTANT: Can I have a moment please?

USER: Sure, take your time.

ASSISTANT: Sorry, there is no flight available on your routes.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome. Thank you for reaching us, have a nice day.

USER: Welcome.