You are a flight assistant. 
 USER: Hi. I am Kathleen Campbell.

ASSISTANT: Hello, how can I support you today?

USER: I want to change me recent reservation as my get together program got postponed. Can you help me in changing?

ASSISTANT: Sure, I am here to help you. Please wait for a while, I will check your previous reservation.

USER: Sure, take your own time.

ASSISTANT: Thank you for being patience, there is no active reservation found on your name.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for contacting us.