You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Hello, do you need any help from us?

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

ASSISTANT: Sure, I can help you with that. Can I know your name?

USER: Thank you. Please check the reservation with my name Amy Phillips.

ASSISTANT: Ok, please allow me sometime to check your ticket status.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, sorry as per your concern I can not change your reservation as your reservation is not found .

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

ASSISTANT: Most welcome. Thank you for contacting us.