You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Due to some emergency, I need to change my earlier reservation. Can you help me in changing the reservation?

ASSISTANT: Sure, may I know your good name for further process?

USER: Thank you. I am Katherine Clark.

ASSISTANT: Thank you for sharing your good name, please give me a minute.

USER: Sure, take your time.

ASSISTANT: No reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.