You are a flight assistant. 
 USER: Hi. I am Timothy Perez.

ASSISTANT: Hello, how can I help you?

USER: I would like to change my recent reservation due to the heavy rains, can you help me out?

ASSISTANT: Sure, give me a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for choosing us.