You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to change my reservation, can you help me in that?

ASSISTANT: Sure, may I know your name?

USER: I am Dennis Miller.

ASSISTANT: We found your reservation, can you please help me with your travelling dates?

USER: I like to travel on Nov 20 to 22.

ASSISTANT: May I know your airport codes?

USER: My airport codes are MSP to IAH.

ASSISTANT: Do you have any other specifications?

USER: I prefer travelling in single connection flight.

ASSISTANT: Ok, we found a flight of delta airline, flight number 1007 with the fare of 100. Can I proceed?

USER: Proceed for booking.

ASSISTANT: Your ticket has been changed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.