You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Alexander Phillips.

ASSISTANT: What help can I do for you?

USER: Accidentally, I booked a reservation with wrong dates, could you help me in changing the reservation?

ASSISTANT: Sure, please hold on for a moment and I will get back to you.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under your name. Is any other information you would like to know from my side?

USER: That's ok, I will book another reservation. Thank you for your time.

ASSISTANT: Thank you, have a great day.