You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I will help you with it. Please help me with your name.

USER: Myself David Hall.

ASSISTANT: Please allow me a minute.

USER: Ok, sure.

ASSISTANT: I have found your reservation details to make the changes as per your request. Please help me with your planned travelling dates.

USER: Ok, thanks for searching my reservation and my travelling dates are Mar 27 and Mar 29.

ASSISTANT: Please help me with your source and destination airport codes.

USER: My travelling airport codes are IAD and LGA.

ASSISTANT: Do you need a break in your journey?

USER: I need single connection flight.

ASSISTANT: Do you have any other preferences in your journey?

USER: No, preference.

ASSISTANT: Please allow me a minute.

USER: Sure, I will wait.

ASSISTANT: We have a connecting flight operated by JetBlue Airlines with a fare of 100. Is it ok for you?

USER: Please proceed for booking.

ASSISTANT: I have booked your ticket in flight-1000. It departs at 9:00 hours and arrives at 19:00 hours.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us. Have a great time. You are welcome.