You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I need to change my existing reservation as my plan to meet my parents got postponed. Can you help me update my reservation which was made on the name of Richard Miller?

ASSISTANT: Sure, I am glad to help you. Please wait for a while, I have to check your reservation status first.

USER: Sure.

ASSISTANT: I have found your reservation, please provide me your travel dates.

USER: Sure, I need to travel on 06/16 and 06/18.

ASSISTANT: Ok, please provide me your preferred airport codes.

USER: They are from EWR to DFW.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Single connection flight is available with Hawaiian airlines and the ticket fare is 100 only. Shall I book the ticket for you?

USER: Yes please.

ASSISTANT: Miller, I have booked your ticket and your flight number is 1009.

USER: Thank you for helping me.

ASSISTANT: You are most welcome and have a nice day.