You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, I will help you in changing the reservation. May I know your name please?

USER: My name is Melissa Williams.

ASSISTANT: Can I know your airport codes too?

USER: My airport codes are OAK and SEA.

ASSISTANT: Can I know your travelling dates please?

USER: My travelling dates are May 04 and May 06.

ASSISTANT: Do you have any specifications?

USER: I prefer single connecting flight.

ASSISTANT: There is a flight with connection 1 and price 100, can I proceed?

USER: Please proceed.

ASSISTANT: Ok, your ticket has been booked.

USER: Thanks for helping me.

ASSISTANT: Thank you for reaching us.