You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of assistance are you looking for?

USER: I want to change my existing reservation, due to some health issue. Can you help me?

ASSISTANT: I can definitely do that for you.

USER: Thank you.

ASSISTANT: Will you please let me know your name?

USER: Yes, I am Samuel Martinez.

ASSISTANT: Ok, please allow me few minutes to check the current status and revert you.

USER: Ok, I will wait.

ASSISTANT: Thanks for waiting, there is no reservation found under your name in our data base.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: Thank you for opting us.