You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nancy Adams.

ASSISTANT: How can I help you Adams?

USER: I would like to change my recent existing reservation because my friend who is participating in gun shooting has been postponed.

ASSISTANT: I will help you, please wait a while.

USER: Ok.

ASSISTANT: There is no reservation found on your name, Nancy Adams.

USER: No problem, thank you.

ASSISTANT: Thanks for opting us.