You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to flight booking agency.

USER: Myself Larry Thompson.

ASSISTANT: Larry, please let me know what kind of service are you looking for?

USER: Due to miscommunication with my friend, I have booked the ticket to Washington without knowing to my friend. Can you please change my existing reservation?

ASSISTANT: Sure, I will help you with that. Please wait for while, I will get back to you.

USER: Thank you.

ASSISTANT: There is no reservation found under your name.

USER: Ok, not an issue. May be my friend has already changed my reservation on behalf of me.

ASSISTANT: Yes, may be.

USER: Thank you for providing information.

ASSISTANT: Thank you for choosing us.