You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Donald Rodriguez.

ASSISTANT: How can I assist you?

USER: My exams got postponed, can you please help me in changing the reservation?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Wait for a minute, please.

USER: Ok.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.