You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to change my reservation, can you help me?

ASSISTANT: Sure, may I know your name please?

USER: Myself Angela White.

ASSISTANT: Angela, please give me a minute.

USER: Sure.

ASSISTANT: There is no reservation found with your details.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for contacting us.