You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jonathan Walker.

ASSISTANT: How could I support you?

USER: I want to change my existing reservation, due to health issue. Can you help me in my changing reservation?

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: We found a reservation on your given name.

USER: Fine.

ASSISTANT: Please share me your journey dates.

USER: My new journey dates are from 11/24 to 11/26.

ASSISTANT: May I know your airport codes please?

USER: My source airport code is Austin, TX - AUS. My destination airport code is Minneapolis & St. Paul, MN - MSP.

ASSISTANT: I found a connecting flight with Spirit airline of flight 1018 and price is 100. Would you like me to proceed?

USER: Proceed with my booking.

ASSISTANT: Your reservation has been done.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us.