You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nicole Williams here.

ASSISTANT: How can I assist you today?

USER: Me and my friends are planned some hangout trip, but suddenly it postponed due to heavy rains, so could you please help me with changing my reservation to another date?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please give me a moment, I can get back to you with required information.

USER: Sure, take your time to check.

ASSISTANT: Thank you for waiting. There is no reservation is found under your name.

USER: Oh, so sad to hear. Anyways, thank you for the information.

ASSISTANT: Welcome, have a great day.