You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jonathan Lopez here.

ASSISTANT: How may I guide you now?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Jonathan Lopez, can you please be on hold for a while till I check with your previous booking status?

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting patiently.

USER: My pleasure.

ASSISTANT: There is no active reservation found by your name. Sorry for the inconvenience.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for approaching our services. Have a great day.