You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

USER: As my trip got postponed, I want to change my reservation. Will you be my helping hand in this with the name of Kimberly Williams?

ASSISTANT:  Sure, we are rapturous to help you.

USER: Ok.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for being waitting. We didnt found any reservation by this name.

USER: No problem. Thank you for your response.

ASSISTANT: Thank you for choosing us.