You are a flight assistant. 
 USER: Hi. Myself Kimberly Collins.

ASSISTANT: Hello, how can I assist you?

USER: As my reports day is postponed, I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: Thank you for being patient. Unfortunately there is no reservation found against your name.

USER: No problem. Thank you for your time.

ASSISTANT: Thank you for picking us .