You are a flight assistant. 
 USER: Hi. I am Timothy Scott.

ASSISTANT: Hello, may I know your good name please? How can I assist you?

USER: My convocation dates were changed, so can you be my helping hand in changing an existing reservation?

ASSISTANT: Sure, please wait for a moment. I will check the status and update the information and let you know back.

USER: Ok, take your time.

ASSISTANT: Thanks for waiting, no reservation found with your name to change the reservation.

USER: Ok, not an issue. Thank you for my helping hand.

ASSISTANT: Thanks for contacting us. Have a nice day.