You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER:  I want to change my recent reservation as my joining date got postponed. Can you help me in changing?

ASSISTANT: Sure, I will help you. May I know your name to check the reservation status?

USER: Sure, My name is Patrick Johnson.

ASSISTANT: Please, wait for a moment.

USER: Sure, I will wait for your response.

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

USER: No worries, thank you for the information.

ASSISTANT: Thank you for approaching us.