You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Due to heavy rains, my Football match is postponed so I need to change an existing reservation. Can you please help me in that?

ASSISTANT: Sure, wait for a while, I will check and get back to you. May I know your name?

USER: My name is Samantha Walker.

ASSISTANT: Sorry to tell that there is no reservation found on your name.

USER: That's not a problem.

ASSISTANT: Thank you for contacting us.

USER: Thanks for your kind information.