You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donald Jackson.

ASSISTANT: How may I help you?

USER: I want to change my reservation, due to financial issues, can you help me?

ASSISTANT: Ok, wait for a while to check your reservation status.

USER: Sure, take your time.

ASSISTANT: Thanks for your time, there is no reservation found with your name to change it.

USER: That's ok, thank you for your information.

ASSISTANT: Welcome, have a good day.