You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I have planned a trip with my wife to celebrate her birthday in Washington but one of his friend came to our house on that day, so we are planned to enjoy that trip in next weekend , can you please help me in changing my ticket?

ASSISTANT: Sure, I will help you in modifying your ticket. May I know your name please to check the status?

USER: Thank you so much and I am Michael Phillips.

ASSISTANT: Ok, please wait for a while.

USER: Yes, I will wait for your response.

ASSISTANT: Sorry, there are no reservations found in our database.

USER: Ok, no issues with that one, thank you for your help.

ASSISTANT: Thank you for choosing us.