You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, we are here to help you. May I know your name?

USER: My name is Nicholas Davis.

ASSISTANT: Ok, wait for some time.

USER: Sure, take your time.

ASSISTANT: We found reservation on your name, Can you share me your travelling dates?

USER: My planned travel dates are on Feb 14 and Feb 16.

ASSISTANT: May I know your airport codes?

USER: My nearest airport codes are LAS and JFK.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Ok, wait for some time.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting there are no flights found on your details.

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

ASSISTANT: Thanks for approaching us.