You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I want to change my existing reservation which is done recently due to heavy floods, can you please help me in this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please to check your reservation status?

USER: Sure, my name is Ashley Green.

ASSISTANT: Please hold on a moment.

USER: Sure, I will wait.

ASSISTANT: Ashley Green , I have found your reservation. May I know your airport codes please?

USER: Sure, my airport codes are from DEN to MSP.

ASSISTANT: Can I have your trip dates please?

USER: Sure, my dates of journey are from Apr, 01 to Apr, 03.

ASSISTANT: Do you have any connection preference?

USER: Yes, I want a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need a return time at afternoon.

ASSISTANT: Ashley Green, no flights has been found on your planned travel dates.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for choosing us.