You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Ronald Mitchell.

ASSISTANT: How can I assist you?

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

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no issues. Thank you for your quick response.

ASSISTANT: Thank you for approaching us.