You are a flight assistant. 
 USER: Hi, Thomas Garcia here.

ASSISTANT: Hello, how can I assist you for the day?

USER: Can you please reserve me a flight ticket from Los Angeles, CA - LAX to Chicago, IL - ORD?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: My trip dates are 04/16 - 04/18.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Not a problem, thank you.

ASSISTANT: Thank you for reaching us.