You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What can I do for you today?

USER: I am planning to change my reservation, can you help me out with that?

ASSISTANT: Sure, I am glad you help you with that.

USER: Thank you.

ASSISTANT: Could you provide me your name?

USER: My name is Lisa Miller.

ASSISTANT: Ok, wait for a minute.

USER: Ok.

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

USER: NO issues, thank you for your time.

ASSISTANT: Thank you for reaching us.