You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: As the invitation which I got to attend for talk festivity has been postponed, I want you to change my reservation. Can you help me?

ASSISTANT: Sure, may I know your name?

USER: I am Michelle Harris.

ASSISTANT: Please wait of a while.

USER: Sure.

ASSISTANT: Thanks for waiting. But, no reservation is found on your name to proceed further.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.