You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my travel dates in my reservation so can you please help me with that?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: Thank you for your response. Sure, my name is Jack Thomas.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: There is no reservation found under your name to change.

USER: Oh! It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.