You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Elizabeth Lopez. Can you help me to change my reservation?

ASSISTANT: Sure, please wait a moment I will check your details and proceed further.

USER: Sure, take your time.

ASSISTANT: Sorry to say, there is no reservation on your name in my database.

USER: Ok, no issues. Thank you for your search.

ASSISTANT: Thank you for reaching us, have a nice day.