You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I support you today?

USER: I need few changes in my existing reservation, can you help me to change my reservation?

ASSISTANT: Sure, I'll hep you with this.

USER: Thanks.

ASSISTANT: Please let me know your name to check the reservation status.

USER: Sure, my name is Kimberly Smith.

ASSISTANT: Thank you for waiting, I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thanks for the information.