You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Rachel Baker.

ASSISTANT: How can I assist you today?

USER: I need to change my recent reservation, Can you please help me with that?

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Sure.

ASSISTANT: Rachel, there is no reservation found under your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for contacting us.