You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you today?

USER: Can you help me to recent reservation because my trip dates are postponed, can you help me?

ASSISTANT: May I know your name please?

USER: I am Betty Harris.

ASSISTANT: Please wait.

USER: Ok, take your own time.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for connecting with us.