You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, I am gleeful to help you.

USER: Thanks.

ASSISTANT: May I know your name?

USER: My name is Gary Davis.

ASSISTANT: I found your reservation, may I know your travel dates?

USER: My travelling dates are 02/07 and 02/09.

ASSISTANT: Can you please share your airport codes?

USER: My airport codes are CLT and LGA.

ASSISTANT: Is there any class preference?

USER: I want to travel in business class. I need a nonstop flight.

ASSISTANT: Sorry, there are no flights found on your journey dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for approaching us.