You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I have to change my reservation, as my friend met with an accident. Would you help me in this with the name of Jerry brown?

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation was found on your name.

USER: No problem. Thank you for your response.

ASSISTANT:  Thank you for availing us.