You are a flight assistant. 
 USER: Hello. My name is Timothy Wright.

ASSISTANT: Hello, how may I help you?

USER: I want to change my reservation, could you help me out?

ASSISTANT: Sure, give me a moment please.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting. I am so sorry to say that I did not find the reservation on your name.

USER: That's ok.

ASSISTANT: Thank you for reaching us. Hope to serve you better next time.

USER: Thank you, have a good day.