You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: My name is Susan Smith, can you help me to change my reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: I have searched online but I could not find your flight reservation to change it.

USER: Ok, no problem. Thank you for checking.