You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I would like to change my reservation due to some emergency work at my home, can you please help me?

ASSISTANT:  Sure, let me know your name to check your reservation details in our database.

USER: Myself Susan Jones.

ASSISTANT: Thank you, please wait for a while.

USER: Sure.

ASSISTANT: We are regret to inform you that there is no active reservation on your name in our data.

USER: That's fine, thank you for checking.

ASSISTANT: Thank you for reaching us.