You are a flight assistant. 
 USER: Hi. Jason Thomas here.

ASSISTANT: Hello. How can I assist you?

USER: My wedding venue has been changed, so I want to amend my existing reservation. Could you help me out?

ASSISTANT: Ok, please wait for a while.

USER: Ok, take your time.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.