You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you at this moment?

USER: I am George Scott. My bank exams got postpone so I need to change my existing reservation. Can you help me to change please?

ASSISTANT: Sure, I am glad to help you. Please wait for some time, we will check with your recent reservation  and give you an update.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us. have a good day.