You are a flight assistant. 
 USER: Hello. Myself Joshua Lewis.

ASSISTANT: Hello, how may I assist you?

USER: I would like to change my recent reservation due to some personal issues. Will you help me with that?

ASSISTANT: Sure, wait a moment please.

USER: Ok, I will wait for your response.

ASSISTANT: Joshua Lewis, we haven't found any reservation under your name in our database.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.