You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Larry Mitchell here.

ASSISTANT: How can I assist you at this moment?

USER: Can you please help me out in changing my recent reservation? As my health is not good to do journeys right now.

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

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for contacting us.