You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I render you today?

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

ASSISTANT: Sure, may I know your good name?

USER: I am Jeffrey Jackson.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

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

USER: Thank you.

ASSISTANT: Thank you for choosing us.