You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to update my trip dates as my plan to go for an adventure trip got postponed. Can you help me in changing?

ASSISTANT: Sure, kindly provide me your name.

USER: I am Nicholas Martin.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: It's Ok. Thanks for your response.

ASSISTANT: Thanks for reaching us, have a good day.