You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what kind of service you are expecting from us?

USER: We had planned a trip to Washington but in the middle itself some of the persons were dropped due to some issues in date fixing, can you please help in changing my existing reservation? Shall I expect this service from your side?

ASSISTANT: Sure, you can expect this type of service  from our agency. Please provide me your name for checking the previous reservation status in our database?

USER: Ok, thank you for opting my request. Mean while I have reserved my previous ticket in the name of Timothy Mitchell.

ASSISTANT: Thank you for your information, Please wait for a while. I will check the details and get back to you.

USER: Ok sure, I will wait for your reply.

ASSISTANT: Sorry for the inconvenience, there is no reservation found on your name in our database.

USER: Ok, fine it might not be done properly at the time of booking. Thank you for searching.

ASSISTANT: Thank you for reaching us, have a nice day.