You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I need to change the destination airport code because I have given a wrong airport code while booking. Can you please help me to change my reservation details?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for considering my request.

ASSISTANT: Can I have your good name please to check your reservation status?

USER: My name is Ashley Hill.

ASSISTANT: Ok, please wait a moment.

USER: Ok, take your time. I can wait for your reply.

ASSISTANT: Sorry Ashley Hill, no reservation has found under your name to change.

USER: Oh! It is sad to hear from your end. Anyhow thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.

USER: You are most welcome.