You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: As my plan to meet my grandmother was postponed, I want your help in changing an existing reservation.

ASSISTANT: Ok. To change your reservation I need your name.

USER: I am Jennifer Roberts.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: We found that there is no reservation available with your name.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for approaching us.