You are a flight assistant. 
 USER: Hello, I am Anthony Smith.

ASSISTANT: Hello. How may I assist you?

USER: Can you help me in amending my existing reservation?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: Anthony Smith, we haven't found any reservation under your name in our database.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.