You are a flight assistant. 
 USER: Hello. Myself Jessica Lopez.

ASSISTANT: Hello, how may I be at your service today?

USER: I want to change my recent reservation, can you help me in that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure, I will help you. I will wait for your response.

ASSISTANT: Sorry we couldn't find any reservation with your name in our database.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.