You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I am looking for changing my reservation due to sudden postponement of my meeting, can you please help me out with that?

ASSISTANT: Sure, I will help you. May I know on which name you have booked the ticket?

USER: Thank you for taking my request into consideration. I have reserved it on the name of Pamela White.

ASSISTANT: Please stay connected.

USER: Sure.

ASSISTANT: Yes, I have found your reservation. May I know your new travelling dates?

USER: That's great, I am planning to leave my location on Mar 28 and please book my return ticket also on May 30.

ASSISTANT: May I know your nearby airport codes?

USER: I want to travel from JFK to SFO.

ASSISTANT: Please stay connected for a while. Do you have any connection preference?

USER: I want a direct flight for my journey.

ASSISTANT: Sorry, there is no flight available with your requirements.

USER: Oh! Sad to hear that. Anyway, I will find another alternative. Thank you for the information.

ASSISTANT: You are welcome, have a nice day.