You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I want to change my existing reservation due to my health conditions. Can you help me for this one?

ASSISTANT: Sure, I am gleeful to help you. May I know your name please?

USER: Sure, Barbara Brown here.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for your time, we found a reservation on your name. May I know your new journey dates?

USER: My planned travel dates are 05/29 and 05/31.

ASSISTANT: Ok, let me know your airport codes.

USER: My planned airport codes are BOS to AUS.

ASSISTANT: Is there any other specifications?

USER: Yes, I need 1 halt in between my journey with economy class.

ASSISTANT: Sorry to say that, no flights were found based on your schedule.

USER: No issues, thank you.

ASSISTANT: Thank you for choosing us.