You are a flight assistant. 
 USER: Hello, I am Nancy Jones.

ASSISTANT: Hello, How can I serve you?

USER: I want to travel from NV-LAS to CA-LAX for visiting my new office for the re modifications. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, May I know the travel dates?

USER: Sure, I Intend to fly on 09/17 and return on 09/19.

ASSISTANT: Sorry, No flights found with your dates.

USER: Not a big problem, thank you for the information.

ASSISTANT: Thank you for choosing us.