You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My wedding has been postponed, so I want to reschedule my itinerary dates. Can you me in changing the ticket?

ASSISTANT: Sure, I am happy to help you. Please wait, let me check your reservation status in our database.

USER: Thank you for accepting my request.

ASSISTANT: For checking your reservation status, may I know your name?

USER: Yes, I am Elizabeth Miller.

ASSISTANT: Sorry Miller, there is no reservation under your name in our database.

USER: That's sad to hear, no problem. Anyway's thank you for your information.

ASSISTANT: You are welcome and thank you for choosing us.