You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I provide assistance to you?

USER: Can you help me to change my reservation to next week?

ASSISTANT: Sure, please share your name to proceed further.

USER: My name is Dorothy Miller.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: We found a reservation on your name, can you share your new airport codes please?

USER: My airport codes are JFK and PHL.

ASSISTANT: May I know your trip dates?

USER: My travelling dates are June 24 and 26.

ASSISTANT: Do you have any other preferences?

USER: I need a direct fight.

ASSISTANT: Sorry, there are no flights on your required details.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for reaching us.