You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Due to my health conditions, I want to change my recent reservation.Can you help me with that?

ASSISTANT: Sure, we are here to help you. May I know your good name please?

USER: Raymond Johnson here.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your time, there is no active reservation found in your name.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for choosing us.