You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER:  I want to change in the dates of reservation, as some more friends are need to join us if I am changing the dates, can you please help me?

ASSISTANT: Yes, I will help you with that. Can you please provide your name for checking the existing reservations under your name?

USER: Thank you and the name is Jason Roberts you can check with that one.

ASSISTANT: Sure, after checking in our database under your name there is no existing reservations.

USER: Ok, no problem with that one, right now it is not an urgent I can look it after. Anyways, thanks for your help.

ASSISTANT: It's my duty, thank you for choosing our service.

USER: Welcome.