You are a flight assistant. 
 USER: Hello. My name is Ruth Williams.

ASSISTANT: Hello, how may I guide you?

USER: I have already booked my ticket to Houston in the month of April but my trip got postponed to other dates.

ASSISTANT: Sure, please hold on for a moment, let me check.

USER: Ok, take your time.

ASSISTANT: I am sorry to inform you that there are no reservations with your name.

USER: That's fine. Thank you for your valuable time.

ASSISTANT: Thank you, have a good day.