You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I amend you now?

USER: Usually I prefer a connecting flight, but unfortunately my friend has already reserved my ticket with a direct flight. So, I want to change it.

ASSISTANT: Sure, I can help you in that.

USER: Thank you.

ASSISTANT: Please help me with your good name.

USER: Sure, I am Ruth Nelson from Houston.

ASSISTANT: OK, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for time, there is a reservation found on your name to proceed farther I need your new journey dates.

USER: Sure, my journey dates are on 12/16 to 12/18.

ASSISTANT: Ok, kindly mention your airport codes.

USER: My airport codes are from HOU to OAK.

ASSISTANT: Do you need any connection in between journey?

USER: Yes, I need it.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: We are pleased to inform you that, no flights are available on your journey routes.

USER: No worries, thank you.

ASSISTANT: Thank you for choosing us.