You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to change my previous flight ticket booking due to some health issues, can you please help me with that one?

ASSISTANT: Sure, we are here to help you. May I know your good name please?

USER: Thank you and my name is Catherine Thomas.

ASSISTANT: Please wait for a while.

USER: Sure, I can wait for your response.

ASSISTANT: Sorry to inform you that there is no active reservation found on your given name.

USER: Not a problem with that one, thank you for checking my reservation status and providing the information.

ASSISTANT: Thanks for contacting us.