You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Myself Rachel Roberts. Due to the postponement of my concert dates, I would like to cancel my reservation.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Unfortunately there is no reservation found under your name.

USER: It's fine. Thank you for your help.

ASSISTANT: Thank you for reaching us.Have a great day.

USER: You are welcome.