You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Michael Lopez here.

ASSISTANT: How can I assist you.

USER: Can you change my flight ticket reservation?

ASSISTANT: Ok, I will help you?

USER: Sure.

ASSISTANT: Sorry, there is no reservation is been found on your name.

USER: Ok, not a problem.

ASSISTANT: Thank you for connecting with our agency.

USER: Thank you.