You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation. Can you help me?

ASSISTANT: Sure, may I have your name please?

USER: Brandon Garcia here.

ASSISTANT: Please wait, I will check the status of your reservation and revert to you.

USER: Sure, Make it fast.

ASSISTANT: Thanks for your time, no reservation found on your name to change it.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for choosing us.