You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: I am Benjamin Green. I want to change my existing reservation because my venue for exhibiting arts has been changed. Will you help me in changing my reservation?

ASSISTANT: Sure, Wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there is no reservations found on your name.

USER: Ok, no issues. Thank you.

ASSISTANT: Thanks for choosing us.