You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my existing reservation due to health issues, can you please help me with that?

ASSISTANT: Sure, may I know your good name?

USER: My name is Larry Parker.

ASSISTANT: We found a reservation on your good name. Please share me your planned travel dates.

USER: I want to fly on Mar 05, return on Mar 07.

ASSISTANT: May I know your source and destination points?

USER: My source and destination airport codes are BOS and DTW.

ASSISTANT: Do you have any other specifications?

USER: I want a flight with one connection.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We found an airline: American Airlines, flight number: 1009 and price is 100 with one connection.

USER: Ok, proceed to booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.