You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I need to change my reservation as my plan to go for trekking got postponed. Can you help me?

ASSISTANT: May I know your good name please?

USER: I am Amy Collins.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: We did not find any reservation on your given name in our data.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you.