You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist right now?

USER: I need to change my reservation as my trip got postponed, can you please help me with changing my reservation?

ASSISTANT: Sure, may I know your good name please?

USER: I am Kevin Rodriguez.

ASSISTANT: We found a reservation on your name, to change your ticket we need some more details. Can you please share me your new airport codes/.

USER: Sure, my airport codes are from HOU to DCA.

ASSISTANT: May I know your travel dates?

USER: I would like to depart on Jan 26 and need to return on Jan 28.

ASSISTANT: Do you have any other preferences?

USER: I would like to travel in normal cost airlines. I need a single connecting flight.

ASSISTANT: Sorry, there is no flight on your details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.