You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of help you are looking from our service?

USER: As my plans to visit New York got postponed, can you please help me in changing my existing reservation to New York?

ASSISTANT: I am glad to help you in changing your reservation. Can you please provide your name to check the reservation status with your name?

USER: My previous reservation has done with the name Betty Evans.

ASSISTANT: Good to say you Betty Evans, I have found your reservation. Can you please provide your postponed dates of journey?

USER: I have planned my journey on the dates of June 19 and June 21.

ASSISTANT: Please provide your nearest airport codes of journey.

USER: My nearest airport codes of journey are BOS and LGA.

ASSISTANT: Do you have any other requirements about the connecting flight please let me know?

USER: I prefer connecting flight for this trip.

ASSISTANT: Do you have any other specifications for your journey to met with?

USER: No, thanks for asking.

ASSISTANT: Sorry Betty Evans, there are no flights with us on your planned dates of journey due to heavy bookings.

USER: Ok, not an issue. Thank you for your time.

ASSISTANT: You are welcome, thank you for reaching us.