You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to go for a vacation but due to some health issues it was postponed. For this I want to change the existing reservation. Will you help me in this?

ASSISTANT: Sure, we are happy to help you. Please wait I will revert you.

USER: Ok.

ASSISTANT: To proceed further may I know your name?

USER: My name is Elizabeth Adams.

ASSISTANT: Thanks for your patience. Sorry, no reservation found on your name.

USER: Not a problem. Thank you for your information.

ASSISTANT: Thank you for availing us.