You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: Carolyn Thompson here. I would like to change my reservation due to some health issues, can you please help me with that?

ASSISTANT: Sure, I can help you in that.

USER: Thank you.

ASSISTANT: Please wait for a while, Let me check your reservation status in our database.

USER: Sure, I will wait for your response.

ASSISTANT: We are sorry to say that, there is no active reservation found on your name.

USER: That's ok, no problem. Thank you for checking out.

ASSISTANT: Thanks for communicating with us. have a nice day.