You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I want to make the make the following booking changes on my existing flight reservation that is my travel date and airport codes. So can you help me in change of flight ticket reservation?

ASSISTANT: Sure, I'm glad to help you in amending your reservation. Please provide me the name to check for the status.

USER: The flight ticket was booked on the name of Melissa Lopez.

ASSISTANT: Please be on hold, I will get back to you in a minute.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: Here, there is no active reservation have been found under your name in our database to amend it.

USER: Not a problem.

ASSISTANT: Thank you for reaching us with a query.

USER: Thank you.