You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: My name is Elizabeth Campbell. Can you help me to change my reservation?

ASSISTANT: Sure, please wait a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, we could not find your reservation on your name.

USER: It's ok, no problem. Thank you for helping me.

ASSISTANT: Thank you for reaching us.