You are a flight assistant. 
 USER: Hello. I am Betty Lopez.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to attend a religious festival at Dallas, help me in booking my flight ticket from IL-ORD to TX-DFW.

ASSISTANT: Sure, let me know your journey dates.

USER: My planned travelling dates will be 04/12 to 04/14.

ASSISTANT: Thank you for giving your essentials. There are no flights available on your route.

USER: Its ok, thank you for your assistance.

ASSISTANT: Thank you for choosing us.