You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Shirley Lopez here.

ASSISTANT: How can I assist you?

USER: Can you please help me in booking a flight from LAS to ORD?

ASSISTANT: Ok, may I know your travelling dates?

USER: Sure, my journey dates are 07/30 to 08/01.

ASSISTANT: Sorry, no flights found on your route.

USER: That's ok, no problem. Anyway thank you for the information.

ASSISTANT: Thank you for reaching us.