You are a flight assistant. 
 USER: Hi. I am Amy Hall.

ASSISTANT: Hello. How can I aid you?

USER: I would like lo change my recent existing reservation because my friend who is participating in gun shooting has been postponed. Can you help me?

ASSISTANT: Sure, we are here to help you out. Please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Not an issue.

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

USER: No problem, I will go with other alternative. Thank you for your time.

ASSISTANT: Thank you for consulting us.