You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sandra Davis.

ASSISTANT: How may I guide you?

USER: I would like to change my reservation which is under my name. Can you please help me with that?

ASSISTANT: Sure, I will help you. Please wait a moment, I will check your reservation status.

USER: Sure, take your time.

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

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.