You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: William Gonzalez here.

ASSISTANT: How can I help you today?

USER: Can you book a flight ticket for my airport codes that is from IAH to EWR?

ASSISTANT: Sure, we are here to help you. Can you please let me know your travelling dates?

USER: The travel dates are from 24 Dec to 26 Dec.

ASSISTANT: Do you prefer any stopover in between journey?

USER: I need a single connecting flight.

ASSISTANT: May I know your specific depart and arrival timings?

USER: The return time would be in the afternoon.

ASSISTANT: Is there any class preference?

USER: I need a economy class.

ASSISTANT: Please help me with your airline preference.

USER: That does not matter.

ASSISTANT: Thanks for providing details, there is a connecting flight found in Delta airline with a fare of 100 and having return time at 15:00 PM. Shall I reserve?

USER: I am fine with the airlines and fare. You can book it.

ASSISTANT: Ok, your ticket is reserved in economy class with flight number 1001 and depart time is 18:00 PM.

USER: Thank you.

ASSISTANT: Thank you for availing us.