You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kenneth Young.

ASSISTANT: How can I assist you today?

USER: I want to change my existing reservation, due to heavy rainfall in Seattle, can you help me in changing my reservation?

ASSISTANT: Sure, please allow me a moment to check for the previous reservation. I found your reservation. Can you please help me with your new travel dates?

USER: I am departing on 01/05 and return on 01/07.

ASSISTANT: Could you please help me with the airport codes?

USER: My departure date is from MCO airport and land in SEA airport.

ASSISTANT: Let me check for the availability of flight.

USER: Sure, take your time.

ASSISTANT: Kenneth, I am sorry to inform you that there is no flight available at your requested dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us, have a great day.