You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I would like to make a flight ticket from DEN to ORD, can you please help me?

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

USER: Sure, my planned travelling dates are Jun, 22 and Jun, 24 respectively.

ASSISTANT: Ok, may I know your name?

USER: Sure, my name is Angela Phillips here.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Ok, not an issue.Thank you for your information.

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