You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER:  Actually my business meeting is postponed so that I want to change an existing reservation, can you help me?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: May I know your good name for checking the existing details?

USER: Sure, I am Robert Smith.

ASSISTANT: Ok Smith, please give me a moment. Thank you for waiting. Your reservation has found under your name, can you please provide me your airport codes of locations?

USER: Sure, I am planning to visit Phoenix in PHX from SEA.

ASSISTANT: Please mention your travel dates too.

USER: And my travelling dates are 06/13 to 06/15.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Happy to inform you, flight 1027 of Hawaiian airlines is available to you. Shall I proceed to book?

USER: Yes, proceed please.

ASSISTANT: Ok Smith, your ticket has confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us. You are welcome.