You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today? May I know your good name please?

USER: I am Rachel Baker. Due to bad weather condition, my concert dates have been postponed. Can you help me in changing the reservation?

ASSISTANT: Sure, please wait for a while, I will check the reservation with your name and revert you.

USER: Sure.

ASSISTANT: We are sorry to inform you, we did not find any reservation against your name.

USER: It's fine.

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

USER: Thank you for your help.