You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I provide assistance to you?

USER: Due to the sudden change in weather, my soccer tournament got postponed. So I want you to change my existing reservation?

ASSISTANT: Ok, for modifying your reservation we need your name to move forward.

USER: Sure, my name is Nicole Collins.

ASSISTANT: Ok, please wait. I will update you about changing.

USER: Sure.

ASSISTANT: I have not find any reservation on your name to change.

USER: Ok, no worries.

ASSISTANT: Thanks for contacting us, have a nice day.

USER: I appreciate your service.