You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

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

ASSISTANT: Sure, please share your name first.

USER: I am Ruth Thompson.

ASSISTANT: Please wait while I fetch your current reservation and revert back to you.

USER: Ok.

ASSISTANT: We didn't find any reservation on your name to change.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.