You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Please inform me, How may I assist you today?

USER: I need to change my reservation for a client meeting but, I have got a sudden call from my friend that one of my friend met with an accident. Can you please aid me to change my existing reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please provide your name, to check the active reservation.

USER: Sure, you can check my reservation on the name of Rebecca Roberts.

ASSISTANT: Ok Rebecca Roberts, please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for your time. We tried to find your reservation but, there was no reservation exist on your name.

USER: Ok, not an issue. Thanks for your kind response.

ASSISTANT: Thank you for contacting our agency.