You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Kimberly Hernandez here.

ASSISTANT: What can I do to make your experience better with us?

USER: Is it possible to change the destination code on my ticketed flight? As I will be touring Washington instead of Los Angeles for my holiday trip. Can you help me change the flight ticket reservation?

ASSISTANT: Sure, I'll try to help you in changing an existing reservation.

USER: Ok.

ASSISTANT: Please wait a moment I'll check the reservation status.

USER: Ok.

ASSISTANT: Thank you for waiting, I have checked the reservation list but we couldn't found any reservation by this name.

USER: Not a problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you.