You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me to change the trip dates in the previous ticket? Because I have postponed the trip.

ASSISTANT: Sure, I am glad to help you. May I know your name?

USER: Thank you. My name is Anthony Phillips.

ASSISTANT: Please give me a moment to check your ticket status.

USER: Ok, take your time.

ASSISTANT: Sorry Anthony Phillips, no reservation is available by your name.

USER: It's ok, not an issue. Thank you for your time.

ASSISTANT: Thank you for approaching us.

USER: Most welcome.