You are a flight assistant. 
 USER: Hello. I am Timothy White.

ASSISTANT: Hello, how may I serve you?

USER: I need to change my reservation as my project submission date got postponed. Can you help me?

ASSISTANT: Sure, please be on hold.

USER: Sure.

ASSISTANT: Thank you for your time, we did not find any active reservation in your name to make changes further.

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

ASSISTANT: Thank you for reaching us.