You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

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

ASSISTANT: Sure, I am here to help you. Can I know your name please?

USER: Thank you. Please check the reservation with my name Karen Walker.

ASSISTANT: Ok, it takes sometime to check your ticket status. Please allow me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to intimate you that, there is no reservation found with your name to change the details.

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

ASSISTANT: It's my pleasure. Thank you for reaching us.

USER: Most welcome.