You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I want to change my existing reservation in the name of Edward Carter. Can you help me in this?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. We didn't found any reservation by this name.

USER: It's ok, thank you for your information.

ASSISTANT: Thank you for consulting us.