You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to change my existing reservation due to bad weather condition, can you please help me with that?

ASSISTANT: Sure, may I know the name to check for the status?

USER: My name is Nancy Turner.

ASSISTANT: Please be on hold, I will get back to you in a minute.

USER: Sure.

ASSISTANT: I have found your reservation, please provide me the airport codes.

USER: My source and destination airport codes are MSP and DTW.

ASSISTANT: May I know the planned travel dates?

USER: I want to fly on May 02, return on May 04.

ASSISTANT: Please provide me the specifications.

USER: I want direct flight. And my return time should be afternoon.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: Not an issue, thank you.

ASSISTANT: Thank you for reaching us.