You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Katherine Robinson. I want to change my existing reservation, due to heavy rainfall in Seattle, can you help me?

ASSISTANT: Katherine Robinson, I am here to help you for this. Let me check you reservation status in our database.

USER: Sure, take your time.

ASSISTANT: Sorry for inconvenience, no reservation is found with your criteria.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you very much for contacting our agency.