You are a flight assistant. 
 USER: Hi, I am Gregory Allen.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a flight ticket to visit my grand mother's home, so can you help me with booking flight ticket on dates 10/10 and 10/12?

ASSISTANT: Sure, we are rapturous to help you.

USER: Thank you.

ASSISTANT: Please help me with your source and destination codes.

USER: Sure, my source code is Las Vegas, NV-LAS and destination code is Charlotte, NC-CLT.

ASSISTANT: Ok, please wait for a while.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting, There were no flights found with your given requirements.

USER: That's fine, thank you for the information.

ASSISTANT: Thank you for availing us.