You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Pamela Jones here. I would like to change my recent reservation, can you help me with this?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Take your own time.

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

USER: That's fine, anyway thanks for your help.

ASSISTANT: Thank you for choosing our service.