You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Christine Williams here. I want to change my reservation today due to my health issues, can you help me please?

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Ok, please check with my previous booking and tell my reservation status.

ASSISTANT: Christine, there is no reservation found under your name.

USER: Oh! That's sad to know, thank you for checking anyways.

ASSISTANT: You are welcome. Thank you for contacting us.

USER: Most welcome.