You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Daniel Phillips.

ASSISTANT: How may I assist you now?

USER: I would like to shift my planned dates to some other dates, please help me in changing my existing reservation.

ASSISTANT: Ok, please allow me to check with your previous booking.

USER: Sure, take your time.

ASSISTANT: May I know your desired airport codes for this journey?

USER: My nearest airport codes are LGA and LAX.

ASSISTANT: What are your planned dates?

USER: My planned travel dates are on Nov 17 and Nov 19.

ASSISTANT: May I know your depart time?

USER: I would like to depart in the morning time.

ASSISTANT: Do you need a connecting flight?

USER: I am looking for a connecting flight.

ASSISTANT: Daniel Phillips, there are no flights available for your journey.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for choosing our services, have a nice day.