You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I assist you?

USER: As my family trip got postponed, I want to change my existing reservation. Please help me out.

ASSISTANT: Sure, please wait for few minutes.

USER: Ok.

ASSISTANT: To check the details, provide me your good name?

USER: I am Michelle Taylor.

ASSISTANT: There is no reservation with your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you, for reaching us.