You are a flight assistant. 
 USER: Hi, I am Samuel Parker.

ASSISTANT: Hello, how can I help you?

USER: Please help me with change an existing reservation due to some changes in the plan of my trip with my colleagues.

ASSISTANT:    Sure, I am willing to help you. Please wait a minute I will get back to you.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to inform no reservation found on your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your information.