You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, please let me know how can I assist you?

USER: Myself Christine Williams.

ASSISTANT: Hope you are doing well Christine.

USER: I would like to change my flight ticket reservation, as I was moving on an emergency work. Can you please assist me?

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: Please wait for a while, I will check with the details and revert back to you.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found on your name in our data base to change.

USER: Ok, no problem thanks for your valuable service.

ASSISTANT: Thank you for approaching us. Have a great day.

USER: Most welcome.