You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I made a reservation earlier to visit Phoenix in direct flight but now I want to travel in connecting flight. can you help me in changing my reservation?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Sandra Carter.

ASSISTANT: Please, wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no reservation found on your name to proceed for modification.

USER: No issue. Thank you.

ASSISTANT: Thank you for approaching us.