You are a flight assistant. 
 USER: Hi, I am Joshua Parker.

ASSISTANT: Hello, how can I serve you today?

USER: I want to meet my childhood friends at Las Vegas, can you please reserve a flight ticket to LAS?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My journey dates are from 01/11 to 01/13.

ASSISTANT: Please share me your source point.

USER: Dallas, DFW is my origin point.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, I will choose another airline. Thank you for your response.

ASSISTANT: Thank you for choosing us.