You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be of your helping hand today?

USER: Owing an emergence, I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, we will help you with that.

USER: Thank you.

ASSISTANT: Can you please forward your name to check your reservation status?

USER: My name is Stephanie Collins.

ASSISTANT: Ok, please be on hold for some time.

USER: Ok.

ASSISTANT: Sorry, we could not find any reservation on your name.

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing our services.