You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you aid me to change my reservation due to emergency?

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: Thank you.

ASSISTANT: You are welcome.

USER: Michelle Hernandez here.

ASSISTANT: Please allow me a minute.

USER: Ok.

ASSISTANT: Michelle Hernandez, I am really sorry to inform you that there is no booking found on your name.

USER: No issue.

ASSISTANT: Thank you for understanding.

USER: Thank you for the help.

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