You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Do you need any help from my side?

USER: I am Benjamin Wilson. I need to change my reservation due to my planned holiday trip got postponed. So please help me with that.

ASSISTANT: Sure, I will try my best for you and please give me some time to check your previous reservation.

USER: Thank you. I will wait for your response.

ASSISTANT: Thank you for your patience, I have checked based on your request but there is no previous reservation done on the user name to change it.

USER: I will check my mail and I will get back to you if I have any concerns regarding this. Anyway, thank you for your time.

ASSISTANT: You are welcome and thank you for reaching our agency. If you have any queries you can reach us at time we are happy to help you.

USER: Most welcome.