You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: My round trip has been postponed due to some issues. Assist me in changing the reservation with the name of Ronald Collins.

ASSISTANT: Please give me a minute, I will check your reservation and revert to you.

USER: Sure.

ASSISTANT: Unfortunately we did not found any reservation on your given name in our records.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for availing us.