You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I have made a reservation earlier, due to some emergency work in my office I want to change my reservation. Can you help me?

ASSISTANT: Sure, I will help you. Please provide me your name to check the details.

USER: Sure, my name is Jennifer Adams.

ASSISTANT: There is no reservation with your name.

USER: No problem, thanks for being in touch with us.

ASSISTANT: Thank you for reaching us.