You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Christopher Jones. Actually, I booked a ticket to NYC for a music concert but due to bad weather, the trip is postponed.

ASSISTANT: Sure, I will change your reservation. Please wait a while.

USER: Sure, take your time.

ASSISTANT: There is no reservation on your name in our database.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you for reaching us.