You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I lend a hand to?

USER: I want to change my existing reservation due to bad weather conditions. Can you please help me with this?

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

USER: Thank you.

ASSISTANT: For changing the reservation. May I know your name please?

USER: Please check under the name of Donna Rodriguez.

ASSISTANT: Please wait for a while.

USER: Sure.

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

USER: Ok, no problem.

ASSISTANT: Thank you very much for contacting our agency.

USER: Thank you for checking.

ASSISTANT: You are welcome.