You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Robert Adams.

ASSISTANT: How can I help you today?

USER:  I want to change my recent reservation as my joining date got postponed, can you please help me in changing the reservation?

ASSISTANT: Sure.

USER: Ok.

ASSISTANT: Please, wait. Thanks for waiting, there is no reservation found on your name.

USER: Not an issue. Thank you for your kind information.

ASSISTANT: Thank you for picking us.