You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please help me to modify my travel dates in the past ticket? Because the planned trip got postponed.

ASSISTANT: Sure, will you mention your name for checking the reservation status?

USER: Thank you for considering my request. My name is Nancy Perez.

ASSISTANT: Please give me a moment.

USER: Ok, I can wait for your response.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: Oh! It is sad to hear from your end. Anyways thank you for checking my ticket status.

ASSISTANT: Welcome, have a great day.