You are a flight assistant. 
 USER: Hi. This is Jennifer Roberts.

ASSISTANT: Hello, how may I abet you at present?

USER: Recently I made a reservation to travel to New York, but due to some health issues I need to change my reservation. So, Can you help me with that?

ASSISTANT: Sure, I will help you in this. Please wait for a few minutes.

USER: Sure.

ASSISTANT: Thanks for your time, no reservation was found on your good name in our database.

USER: That's ok, thanks for your kind information.

ASSISTANT: Thank you for choosing us.