You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Could you please help me yo update my travelling dates in my existing reservation?

ASSISTANT: Sure, to check with that can you please help me with your name?

USER: I am Amy Johnson.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. The reservation which you asked for is found, please mention your new trip dates to modify?

USER: I intend to depart on Jan 4th and my return date will be on Jan 6th.

ASSISTANT: Could you please help me with the airport codes?

USER: LGA and DEN are my updated airport code.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have any other specifications.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. Here I found a flight with 2 connections and the airfare is about 100. Shall I proceed in booking with the flight number 1006?

USER: That's fine, you can book the ticket.

ASSISTANT: As per your request your booking is changed, and the airlines is United Airlines which departs at 22:00PM and arrival by 10:00AM.

USER: Thank you for your help in booking.

ASSISTANT: Thank you for opting us, have a safe journey.