You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jennifer Adams.

ASSISTANT: How may I aid you?

USER: I want change my reservation due health problem, can you help me?

ASSISTANT: Sure, please be on hold for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight found your name.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for choosing our agency.