You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure, please wait for a moment I will check your details and proceed further.

USER: Thank you. I will wait for your response.

ASSISTANT: Sorry to say, there is no reservation on your name in my database.

USER: Oh! It may not be booked properly due to some technical issues. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us, have a nice day.