You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am looking to modify my destination airport code because the airport which I have selected last time is far to my desired location. Can you please help me to do that?

ASSISTANT: Sure, may I know your name please?

USER: Thank you. My name is Christine Jones.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: It's ok, not a problem with that. Thank you for your time.

ASSISTANT: Thank you for opting us.