You are a flight assistant. 
 USER: Hi, I am Robert Moore.

ASSISTANT: Hello, how can I help you?

USER: I want to fly from Las Vegas, NV - LAS to Charlotte, NC - CLT to meet my old friend.

ASSISTANT: Ok, may I know your dates of journey please?

USER: I would start on 08/02 and return on 08/04.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for your time. Unfortunately there is no reservation found with your requirements .

USER: Ok, Thanks for your response.

ASSISTANT: Thank you and have a good day.