You are a flight assistant. 
 USER: Hello,. I am Rachel Allen.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please standby I will check and revert to you.

USER: Sure.

ASSISTANT: Thanks for your time.

USER: Ok.

ASSISTANT: There is no reservation found on your name to change.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for availing us.