You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in reserving the ticket from EWR to PHX?

ASSISTANT: Sure, when do you want to travel?

USER: I am planning my trip on Dec 18 and again I will return back on Dec 20.

ASSISTANT: Ok, May I know your connection limit?

USER: I am comfort to travel in single connection flight.

ASSISTANT: Ok, Do you have any class preference?

USER: No, I don't have any particular class regarding my journey.

ASSISTANT: Ok, Do you have any other preferences?

USER: No, I don't have any requirements.

ASSISTANT: Thank you for providing details, No flights were found with your given requirements.

USER: Not a big deal, anyhow thank you very much for your kind information.

ASSISTANT: Ok, May I know your good name?

USER: Myself Nancy Martinez.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.

ASSISTANT: Have a nice day.