You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to change my existing reservation due to bad weather condition, can you please help me with that?

ASSISTANT: Sure, may I know your name?

USER: My name is Linda Perez.

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

USER: Sure.

ASSISTANT: Sorry Linda Perez, no reservation is available by your name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for choosing us.