You are a flight assistant. 
 USER: Hi, I am Elizabeth Lee.

ASSISTANT: Hello, how can I support you today?

USER: I just want to change an existing reservation due to heavy rains in my city, can you help me in changing the reservation?

ASSISTANT: Sure, give me a moment.

USER: Sure.

ASSISTANT: Thank you for your time. Unfortunately, we found no reservation by your name.

USER: Ok, no issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.