You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Owing to an emergency I want to cancel my reservation, can you assist me?

ASSISTANT: Sure, I will help you. Could you please provide your name to check your previous reservation status?

USER: I am Catherine Walker.

ASSISTANT: Ok Walker, please hold on to check.

USER: Ok.

ASSISTANT: We regret that, there is no reservation found with your name in our records.

USER: Not an issue, thank you for checking.

ASSISTANT: Thank you for approaching us, have a great day.