You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I want to change my reservation due to my health issues, can you please help me with this?

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

USER: I am Richard Rodriguez.

ASSISTANT: Give me a minute.

USER: Sure, you can.

ASSISTANT: We didn't  found any reservation by this name.

USER: Ok, I will go with alternate source. Thank you for searching.

ASSISTANT: Thank you for reaching us.