You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Jack Jones.

ASSISTANT: Jones, how may I help you?

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

ASSISTANT: Sure, I am glad to help you. Please give me a moment to check your ticket status.

USER: Sure, take your time.

ASSISTANT: Sorry, no reservation is found by your name.

USER: It' ok fine, no problem. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.