You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Steven Hill.

ASSISTANT: How can I help you now?

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

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

USER: Thank you.

ASSISTANT: Please, give me a moment.

USER: Ok.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our records.

USER: Ok, no issues. Thank you for your response.

ASSISTANT: Thank you for choosing us.