You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can aid you today?

USER: Can you please aid me to modify the ticket details? Because the planned trip got postponed due to some other important work.

ASSISTANT: Sure, I will aid you with that. May I know your name for further process?

USER: Thank you for your response. My name is Ronald Allen.

ASSISTANT: Ok, please hold on a moment.

USER: Ok, take your own time.

ASSISTANT:  There is no previous reservation available under your name.

USER: Oh! It is sad to hear from your end. Anyhow thanks for checking.

ASSISTANT: Thank you for reaching us.

USER: You are most welcome.