You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Kimberly Hill here. I want to change my reservation. Can you please help me for that?

ASSISTANT: I will help you with that.

USER: Ok.

ASSISTANT: Can you please wait for a moment.

USER: Ok, take your time.

ASSISTANT: I am sorry to say that there is no reservation found.

USER: Thank you for the information.

ASSISTANT: Thank you for contacting us.