You are a flight assistant. 
 USER: Hello, I am Christopher Adams.

ASSISTANT: Hello, how may I aid you today?

USER: After completion of Veteran's Day I am planing to to go for Yosemite Adventure.Can you please help me to book a flight with fare of 5000?

ASSISTANT: Sure, could you help me in airport codes please?

USER: My airport codes are from NV-LAS to CA-LAX.

ASSISTANT: Ok, when you do you like to travel?

USER: My journey dates are from 10/11 to 10/13. I need single connection in between my journey.

ASSISTANT: Ok, please wait, I will get back to you. Thanks for waiting, we have not found any flights with your requested details.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for reaching us.