You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you today?

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

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Let me know your name to check your reservation?

USER: My name is Jeffrey Smith.

ASSISTANT: Ok, please wait a moment.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: It's ok, not a problem. I think the ticket is not booked properly. Thank you for checking my ticket status.

ASSISTANT: Thank you for reaching us.