You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: Due to heavy rains I want to change my reservation, can you help me?

ASSISTANT: I will help you, can I know your name?

USER: Deborah Lewis here.

ASSISTANT: Sorry for inconvenience Deborah, there is no reservation found with your name to change.

USER: That's fine. Thank you for checking.

ASSISTANT: It's my pleasure.