You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: Owing to emergency, I need to change my recent reservation. Please help me in that.

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you.

ASSISTANT: Can you please tell me your name?

USER: I am Kenneth King.

ASSISTANT: Sorry, no reservation found on your name to change your reservation.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for choosing us, have a nice day.