You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I want to change my reservation as I have met with an accident. Can you help me with that?

ASSISTANT: I am sorry to hear that, I will help you.

USER: Thanks for your concern.

ASSISTANT: Please let me know with your name.

USER: Yes, I am Timothy Thompson.

ASSISTANT: Please allow me a minute.

USER: Sure.

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

USER: Not a problem, anyways thank you for the information.

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