You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to change my reservation which is under my name, as my business meeting has been postponed. can you please help me with that?

ASSISTANT: Sure, I am happy to help you. Please help me with your name.

USER: My name is Jack Nelson.

ASSISTANT: Thank you so much, please wait for a while. I will check your reservation status and get back to you.

USER: Sure, take your time.

ASSISTANT: Sorry, I have not found any reservation under your name in our database.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: You are welcome and thank you for choosing us.

USER: You are welcome.