You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you please change my recent reservation?

ASSISTANT: Sure, may I know your name to check the reservation list?

USER: I am Nicole Davis.

ASSISTANT: Ok, please wait a minute I will get back to you with the present status.

USER: Sure.

ASSISTANT: Thank you for being patient, we found a reservation on your name. Could you please share your travelling dates?

USER: My trip dates are in July from 18th to 20th.

ASSISTANT: Ok, do you need any break in between the journey?

USER: Yes, I would like a break in between my journey.

ASSISTANT: May I know your airport codes please?

USER: My airport codes are DFW to PHX.

ASSISTANT:  Is there any another specifications on your trip, so that I can arrange like that only.

USER: I prefer to travel in economy class. I want to depart at evening time.

ASSISTANT: Thank you for providing your details, we didn't find any flights which matches your requirement.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us, have  a good day.