You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help 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?

USER: Patricia Gonzalez here.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: No reservation found on your name.

USER: No problem, thank you for sharing the information.

ASSISTANT: Thank you for approaching us.