You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Jeffrey Harris. My tour trip got postponed, so I want to change an existing reservation. Could you help me in changing a reservation?

ASSISTANT: Sure, I am here to help you. Please stand by I will get back you.

USER: Sure.

ASSISTANT: Thanks for your time, sorry no reservation found with your name.

USER: Not an issue.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your information.