You are a flight assistant. 
 USER: Hello. I am Thomas Brown.

ASSISTANT: Hello. How may I assist you?

USER: I had planned to go on a trip, but it was postponed. Can you change my recent reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait a moment, I will check the status of your reservation.

USER: Ok, take your time.

ASSISTANT: Thomas Brown, no reservation has been found on your name in our database.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for reaching us.