You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am looking change my recent ticket details because the planned trip got postponed. Can you please help me to change the details?

ASSISTANT: Sure, I can help you in that one. May I know your name for checking purpose?

USER: Thank you. My name is Gary Martinez.

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting, there is no reservation found for the user name in our data base to help you out in modification.

USER: It's ok, not a problem with that. Anyways, thank you for searching my ticket status.

ASSISTANT: You are most welcome and thank you for reaching us, have a nice day.

USER: Welcome.