You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this minute?

USER: I would like to change my reservation as I am leaving for hometown, can you please help me out?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Michael Parker here.

ASSISTANT: Ok, wait for a minute.

USER: Sure.

ASSISTANT: I have found the reservation. May I know your travelling dates?

USER: I am travelling on these dates Jan 27th and 29th.

ASSISTANT: Ok, may I know your airport codes?

USER: I would like to fly from EWR to IAH.

ASSISTANT: Do you have any other requirements?

USER: I prefer economy class.

ASSISTANT: May I know your connection limit?

USER: I need a single connected flight.

ASSISTANT: Sorry to say that, there are no flight's available based on your journey dates.

USER: Ok no problem, thank you for your services,.

ASSISTANT: Thank you for reaching us.