You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you for the day?

USER: Can you please change my reservation as my schedule to attend the seminar got postponed?

ASSISTANT: sure, I will help you. Can I have your name to check the previous reservation?

USER: I am Jennifer Miller.

ASSISTANT: Please standby.

USER: Ok.

ASSISTANT: Thanks for waiting, no reservation exist with your name.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.