You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you today?

USER: Owing to an emergency, I want to change my recent reservation. Can you help me with that?

ASSISTANT: Sure, may I know your name please?

USER: Sarah Campbell here.

ASSISTANT: Please wait a moment, let me check the reservation states/.

USER: Sure.

ASSISTANT: Sorry, there is no active reservation on your name.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you.