You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Frank Allen here.

ASSISTANT: How may I help you today?

USER: I would like to change my reservation due to heavy snowfall in my region, can you help me?

ASSISTANT: Sure, I will be helping out.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry there are reservation found on your name.

USER: Ok, no problem. Thank you for your help.

ASSISTANT: Thank you for choosing our service.