You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Kathleen Taylor here.

ASSISTANT: How can I assist you Kathleen Taylor?

USER: Due to health issues, I want to postpone my trip. Can you please help me in changing my reservation?

ASSISTANT: Sure, I will help you with this. There is no active reservation found under your name in our database.

USER: Oh! that's ok, thank you for your information.

ASSISTANT: Thank you for contacting us.