You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Owing to an emergency I had to request for this change reservation.

ASSISTANT: Sure, we are here to help you. Can you please share your name?

USER: I am Carol Martin.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

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

USER: Thank you.

ASSISTANT: Thank you for choosing us.