You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I abet you for the day?

USER: I am Patricia Collins. Due to continues rainfall, my tennis match has been postponed.Could you please change my existing reservation?

ASSISTANT: Sure, please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your valuable information.