You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Sarah Adams, can you help me to change the reservation I had done last month?

ASSISTANT: Sure, I will help you. Please wait a moment.

USER: Ok, please take your own time.

ASSISTANT: Sarah Adams, no reservation has been found on your name in our database.

USER: That is ok, thank you for assisting me.

ASSISTANT: Thank you for choosing us.