You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me in changing my previous reservation?

ASSISTANT: Sure, please provide me your name?

USER: My name is Rachel Martinez.

ASSISTANT: Please wait a second.

USER: Ok.

ASSISTANT: There is no reservation with your name.

USER: No issue. Thank you for the information.

ASSISTANT: Thank you for reaching us.