You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Samuel Brown.

ASSISTANT: Brown, how may I aid you?

USER: I need to change my reservation due to my planned event got postponed. So please help me with changing my reservation.

ASSISTANT: Sure, I can help you. Please give me a moment to check your ticket status.

USER: Thank you. I will wait for your response.

ASSISTANT: I found your reservation, could you provide your rescheduled itinerary dates?

USER: That is great. I have planned my travel dates as 10/07 and 10/09.

ASSISTANT: Please provide your airport codes.

USER: Sure, I would like to travel from DFW to HOU as these are the airports very much near to my locations.

ASSISTANT: Please give me a moment to check for available flights.

USER: Sure but please check for direct flight which should not having any connections.

ASSISTANT: Delta airlines with flight 1009 is providing service with a connecting flight and ticket costs you 200.

USER: I have mentioned that connection should be 0 but again you are providing the connecting flight. Don't you have any direct flights now?

ASSISTANT: Sorry, no direct flight is available on your route.

USER: That's what I am asking. Anyway, thank you for your time.

ASSISTANT: Thank you for contacting us.

USER: Most welcome.