You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Donald Lee here.

ASSISTANT: Do you need any help from us?

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

ASSISTANT: Sure, I am beatific to help you. Lee, there no reservation matching with your name to change further.

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

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