You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Nicholas Young.

ASSISTANT: Young, how can I assist you?

USER: Actually I have a workshop to attend in Seattle, but due to bad weather the workshop is postponed. Could you help me in changing the reservation?

ASSISTANT: Sure, please wait for a moment to check our database.

USER: Sure, take your time.

ASSISTANT: Sorry, no reservation found by your name.

USER: That's so sad to hear.

ASSISTANT: Do you have any other concerns?

USER: No, thank you for your time.

ASSISTANT: Thank you for contacting us.