You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I'm Robert Miller, planning to visit Chicago city. Can you please book me a ticket from LAX to ORD?

ASSISTANT: Sure, I will help you with that, please share your travelling dates?

USER: My preferable journey dates are from 08/24 to 08/26.

ASSISTANT: Sorry for the inconvenience, no flights as per your details. Thank you for reaching us.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you.

ASSISTANT: It's my pleasure.