You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to some modifications in my previous reservation. Can you help me for that?

ASSISTANT: Sure, please mention your name to check your reservation details in our database.

USER: My name is Lisa Martinez.

ASSISTANT: Thank you. Please wait for a while, let me check your reservation status.

USER: Sure, I will wait for your response.

ASSISTANT: I am sorry to say you that there is no reservation found under your name in our database.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for connecting us.

USER: Welcome.