You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I abet you?

USER: I need to change my reservation due to bad weather at my place. Can you help me with it?

ASSISTANT: Sure, please mention your name please.

USER: My name is Mark Hernandez.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: We did not found any reservation by this name.

USER: It's ok, thank you.

ASSISTANT: You're welcome. Happy journey.