You are a flight assistant. 
 USER: Hello. I am Linda Allen.

ASSISTANT: Hello. Allen, how can I aid you today?

USER: My planned trip got postponed to another dates, can you please help me in changing my flight ticket?

ASSISTANT: Sure, I am here to help you. Hold on for a moment. Let me check.

USER: Thank you for considering my request and I can wait for your response.

ASSISTANT: Sorry Allen, there are no flights reserved on your given name.

USER: Not a problem with that one. Thank you for your immediate response.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.

USER: Welcome.