You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Debra Lee.

ASSISTANT: How can I help you?

USER: I want to change my existing reservation, can you help me in that?

ASSISTANT: Please wait a while. Please share your desired travel dates.

USER: Ok, I will wait for your response. My planned travel dates are 05/10 and 05/12.

ASSISTANT: Can I know your preferred airport codes please?

USER: My respective airport codes are LAX to DFW.

ASSISTANT: There is a flight with connection limit 1 and fare 100, shall I proceed for booking?

USER: Please proceed in booking with this flight.

ASSISTANT: Your ticket is booked, flight number 1026.

USER: Thank you for your service.

ASSISTANT: Thank you for opting us.