You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Due to sudden changes in the trip I would like to change my recent booking, can you please help in that changing my booking?

ASSISTANT: Sure, I will help with this. Please, provide me your name to check the reservation details?

USER: Sure, my name is Eric Turner.

ASSISTANT: Sorry Eric, no reservation found on your name in our data base.

USER: Ok, that's fine, no problem with that, thank you for your quick response.

ASSISTANT: Ok, thank you for reaching us.

USER: Thank you.