You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Ok, let me know your name please?

USER: Myself Charles Taylor.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Thank you for your patience. Sorry Charles, there is no reservation found under your name in our database.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us. Have a great day.