You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I want to change my existing reservation due to bad health issues. Can you help me with that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Sure, Sandra Lee here.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, I found your reservation in our system data. Please share me your airport codes?

USER: I will fly from LAX to reach DEN.

ASSISTANT: May I know your planned journey dates?

USER: My trip dates are Oct 05 and Oct 07.

ASSISTANT: Do you have any requirement related to booking?

USER: Yes, I am looking for a flight with one connection.

ASSISTANT: Thank you for the details, I found a connecting flight 1012 of airline JetBlue, fare is 100 and class is economy. Shall I proceed with booking?

USER: Please go ahead.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a nice journey.