You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Due to health issues, I need to change my recent reservation. Please help me with that.

ASSISTANT: Sure, please share your good name?

USER: I am Anna Davis.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: We found a reservation on your given name, can you please share your new journey dates?

USER: My journey dates are from Dec, 23 to Dec, 25.

ASSISTANT: May I know your airport codes?

USER: My source airport code is BOS and destination airport code is HOU.

ASSISTANT: Do you have any specifications?

USER: I need an economy class and I need a single connecting flight.

ASSISTANT: We found a flight in United airlines, flight number is 1013 with single connection and price is 100 economy class. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your new reservation has been changed.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.