You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I am Betty Hill. I want to change my existing reservation due to bad weather. Can you help me in changing reservation?

ASSISTANT: Sure, I am here to assist you. Please hold on. I will get back to you.

USER: Sure.

ASSISTANT: Thanks for holding on, we hardly tried to find your reservation but, no reservation has been found with your provided name.

USER: Ok, No problem.

ASSISTANT: Thanks for approaching us, hope to serve you again.

USER: Thanks for the information.