You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I am Samuel Jackson, I would like to change my recent reservation due to some personal work, can you help me to change this reservation?

ASSISTANT: Sure, please wait I will check the reservation status and revert to you.

USER: Sure, take your own time.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: No issue, anyway thanks for your valuable information.

ASSISTANT: Thank you for contacting us.