You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Carol Adams. Due to heavy rainfall, I couldn't travel out. Can you please help me in changing my existing reservation?

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Sorry to say, there is no reservation on your desired travel dates.

USER: It's ok, no issues. Thank you for the information.

ASSISTANT: Thank you for opting us.