You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Andrew Adams.

ASSISTANT: How can I assist you?

USER: I want to do some changes in my existing reservation. Can you help me for that?

ASSISTANT: Sure, I will do that for you. Please wait for a moment, let me check your reservation status in our database.

USER: Sure, I will wait for your response.

ASSISTANT: There is no reservation found in our database with your name.

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

ASSISTANT: Thank you for connecting us.

USER: Welcome.