You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jacob johnson.

ASSISTANT: How can I assist you?

USER: I need to amend my reservation, can you help me out please?

ASSISTANT: Sure, I can help you with that. Please be on hold.

USER: Sure, take your own time.

ASSISTANT: Jacob, there is no reservation found under your name to do changes in that.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.