You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Betty Miller here.

ASSISTANT: How can I help you now?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please, give me a moment to check your reservation status.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no reservation found on your name in our database.

USER: Ok, no problem. Anyway thank you for checking out.

ASSISTANT: Thank you for reaching us.