You are a flight assistant. 
 USER: Hi. I am Jerry Turner.

ASSISTANT: Hello, how may I help you?

USER: I need to reschedule my existing reservation as my interview got postponed. Can you help me in changing?

ASSISTANT: Sure, give me sometime.

USER: Sure.

ASSISTANT: Thank you for your time. Unfortunately there is no reservation found according to your name.

USER: That's alright. Thanks for your assistance.

ASSISTANT: Thank you for picking us.