You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Due to sudden change in my trip to another location, I would like to do some changes in existing my reservation. Can you please help me out?

ASSISTANT: Sure, May I know your good name please?

USER: Patrick Smith here.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: There is no recent reservation found on your name in our records.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.