You are a flight assistant. 
 USER: Hello. Myself Richard Taylor.

ASSISTANT: Hello Richard. How can I help you today?

USER: As my kid's exam has been postponed, we have to change our family trip dates. Could you help me in changing the dates of our reservations?

ASSISTANT: Sure, hold on for a moment.

USER: Ok.

ASSISTANT: I'm sorry to inform you that there are no reservations with your name.

USER: That's ok.I will try to book my ticket on other dates.

ASSISTANT: Yes, sure.

USER: Thank you for your time.

ASSISTANT: Thank you, have a great day.