You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Phillips.

ASSISTANT: How can I assist you, Phillips?

USER: I need to change my reservation due to my planned event got postponed. So please help me with that.

ASSISTANT: Sure, please give me a minute.

USER: Sure, take your time.

ASSISTANT: Shirley, there is no reservation found with your details.

USER: Oh! It is ok. Anyway, thank you for your time.

ASSISTANT: Thank you for contacting us.