You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: This is Sarah Roberts, from Detroit.

ASSISTANT: How can I serve you?

USER: I want to change my existing reservation. As my soccer match got postponed, due to the sudden death of the greatest football player. Can you help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please standby.

USER: Sure, make it as soon as possible.

ASSISTANT: Thanks for  your time, there is no active reservation found on your name.

USER: That's ok, not an issue. Thanks for your kind information.

ASSISTANT: Thank you for choosing us.