You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am trying to change the trip dates in the past ticket because the examination was postponed. Can you please help me to do that?

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

USER: Thank you for considering my request. My name is Daniel Phillips.

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

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

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

ASSISTANT: Welcome, have a great day.