You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am looking to change the trip dates because the trip got postponed. Can you please help me with that?

ASSISTANT: Sure, I will help you in changing the ticket. May I know your name please?

USER: Thank you for considering my request. My name is Michelle Jones.

ASSISTANT: Can I know your travelling dates please as I found the reservation?

USER: That's nice, the planned travel dates are May 12th and May 14th.

ASSISTANT: May I know your airport codes too?

USER: The source and destination airport codes are JFK and HOU.

ASSISTANT: Do you need any specifications?

USER: I need a flight in the business class. So, please search for that.

ASSISTANT: Can I know your other preferences?

USER: I prefer to travel in a single connecting flight.

ASSISTANT: Sorry, there are no flights found in our database.

USER: It's ok, not a problem with that. Thank you for your time.

ASSISTANT: Thank you for reaching us.