You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me to change my reservation? Because I have some work on that dates.

ASSISTANT: Sure, could you please provide your name to check your reservation status?

USER: My name is Catherine Phillips.

ASSISTANT: Ok, please hold on for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to say, there is no reservation found on your name in my database.

USER: Ok, no issues. Thank you for your time.

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