You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Jessica Hills want to change my existing reservation as my board meeting has been postponed. Can you please help in that?

ASSISTANT: Sure, may I know your name? Please wait for a while, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry to tell that there is no reservation  on your name.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for approaching us.