You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: My name is Christopher Edwards. As my conference meeting got postponed I want to change my existing reservation. Can you help me out with change reservation?

ASSISTANT: Ok, please wait. I will check the status.

USER: Sure.

ASSISTANT: Thanks for your patience.

USER: Ok.

ASSISTANT: There was no reservation found on your name.

USER: OK, No problem. Thank you.

ASSISTANT: Thank you for opting our service.