You are a flight assistant. 
 USER: Hello, I am Timothy Martin.

ASSISTANT: Hello, how can I assist you?

USER: Due to exams postpone, I want to change my recent reservation. Can you help me with that?

ASSISTANT: Sure, I can help you with that. May I know your name. Please wait a moment. I will get back to you.

USER: OK.

ASSISTANT: Thanks for your patience. There was no reservation found on your name.

USER: OK, no problem.

ASSISTANT: Thank you for connecting with us.

USER: Thanks for your service.