You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I am happy to help you. May I know your name?

USER: Myself Timothy Martin.

ASSISTANT: Thank you. Please wait for a while, let me check your reservation status in our database.

USER: Ok, I will wait.

ASSISTANT: Sorry, I did not find any reservation under your name in our database.

USER: Thank you for checking.

ASSISTANT: You are welcome and thank you for choosing us.