You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Due to some issues I have to change my flight ticket reservation, can you please help me in changing my flight ticket?

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: Can you please provide the name to check your reservation status?

USER: My name is Karen Garcia.

ASSISTANT: Karen Garcia, there is no active reservation found under your name in our database.

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

ASSISTANT: Thank you for contacting us.

USER: Welcome.