You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Ashley Collins, want to change my reservation as the baby shower program which I want to attend got postponed. Can you please help me in changing reservation?

ASSISTANT: Sure, I can help you on that.

USER: Thank you.

ASSISTANT: Please give me sometime to check your details.

USER: Sure.

ASSISTANT: I regret, there is no reservation found on your name.

USER: It's ok, thank you for the kind information.

ASSISTANT: Thank you for contacting us.