You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you?

USER: I am Samantha Robinson. I would like to book a  ticket from DEN to ORD, can you please help me out?

ASSISTANT: Ok, may I know your travelling dates?

USER: I am travelling on these dates 03/05 and 03/07.

ASSISTANT: Sorry, no flights found on your preferable dates.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.