You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I am Angela Martinez. I need to change my existing reservation, can you please help me with that?

ASSISTANT: Sure, please wait for few minutes.

USER: Sure.

ASSISTANT: There is no existing reservation found on your name in our records. Thank you for reaching us.

USER: Thank you for your information.