You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: Owning an emergency at my home I can not travel right now, so I want you to change my existing reservation. Can you please help?

ASSISTANT: Sure, we are here to help you. May I know on which name the ticket has been reserved?

USER: On my name that is Samantha Wilson.

ASSISTANT: Please be on hold for some time.

USER: Sure.

ASSISTANT: Sorry we did not find any reservation against your name.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.