You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Andrew King here.

ASSISTANT: How can I assist you?

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

ASSISTANT: Ok, please can you wait a moment?

USER: Sure.

ASSISTANT: Sorry, there is no reservation been found as per the records.

USER: Not a problem.

ASSISTANT: Ok, thank you for choosing our agency.

USER: Thank you.