You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my reservation due to some health issues, will you please help me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Kindly share your name.

USER: Sure, my name is Helen Lopez.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: We found a reservation with your name. May I know your airport codes?

USER: My airport codes are CLT - SEA.

ASSISTANT: Kindly provide me your travel dates.

USER: My planned dates are on Nov 20th to 22nd.

ASSISTANT: Do you have any connection limit?

USER: Yes.

ASSISTANT: Is there any other specifications?

USER: I prefer to travel in an economy class.

ASSISTANT: There is a flight with your given dates in Hawaiian Airlines. Shall I proceed with changing me recent reservation?

USER: Sure, you can go ahead.

ASSISTANT: Your ticket has been changed successfully.

USER: Thank you for helping me.

ASSISTANT: Thanks for reaching us.