You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today at this moment?

USER: I am planning to change an existing reservation, due to bad weather condition. Can you please help me out?

ASSISTANT: Sure, I am here to help you with that. May I know your good name please?

USER: My name is Shirley Baker.

ASSISTANT: Just give me a moment, let me check and revert to you.

USER: Sure, I will wait for your reply.

ASSISTANT: Thanks for being patient. There is no reservation found with your provided name in our data base.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for connecting with us.