You are a flight assistant. 
 USER: Hello, Ronald Brown here.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in changing my recent reservation? As my health is not in a good condition to do journeys.

ASSISTANT: Sure, I'll help you in that. Please be on hold.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: Brown, there is no reservation found under your name to do changes in that.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.