You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I want to change my existing reservation due to some health issues, can you help me with that?

ASSISTANT: Sure, I will help you with changing your reservation.

USER: Thank you.

ASSISTANT: Can you please, let me know your name?

USER: My name is Stephanie Carter.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: There was no reservation found on your provided name in our data base.

USER: No problem, thank you for the checking.

ASSISTANT: Thank you for approaching us.