You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Virginia White here. I want to change my existing reservation due to heavy rains. Can you help me for this one?

ASSISTANT: Sure, I will help you in changing the reservation.

USER: Thank you.

ASSISTANT: Happy to inform you that I have found the reservation. Can I know your travelling dates please?

USER: My planned travel dates are 10/09 and 10/11.

ASSISTANT: May I know your airport codes too?

USER: Sure, my conformed airport codes are AUS-EWR.

ASSISTANT: Do you have any specifications?

USER: Yes, I want a flight with maximum connection of 1.

ASSISTANT: Can I know your preferences?

USER: Make sure that, my return time in evening and departure time in morning only.

ASSISTANT: Do you have any other preferences?

USER: No more, thank you.

ASSISTANT: Sorry, there are no flights found in our database.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for reaching us.