You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Elizabeth Turner.

ASSISTANT: How can I assist you?

USER: I would like to change my existing reservation, can you help me in that?

ASSISTANT: Ok, I am here to help you with that.

USER: Thank you.

ASSISTANT: Can you please wait for a while.

USER: Sure, take your time.

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

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

ASSISTANT: Thank you for connecting with us.