You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Stephanie Carter. As my plan to meet my friend got postponed, I need to change my existing reservation. Will you help me with that?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Thanks for being waiting.

USER: Ok.

ASSISTANT: We didn't found any reservation by this name.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for opting us.